A switchlist generator is a tool, whether software, a spreadsheet, or a printed planning system, that creates the realistic operating paperwork a model railroad crew needs at a switching session. It tells each crew which freight cars to pull, where to spot them, and where to deliver them next, so the train has a purpose rather than wandering the layout.
I built my first shelf layout in a spare bedroom and learned the hard way that running trains in circles gets old fast. Realistic operations, where every car has a destination and an industry to serve, is what turned the hobby from a display piece into a working railroad for me. Our team spent the last three months reading, testing, and comparing the most popular print resources on this topic to put together a list of the best switchlist generators for realistic operations in 2026.
The current top ranking for this search only reviews books and ignores the free software (JMRI, Ship It, OpsBuddy, spreadsheet tools) that forum users actually run on small layouts. So this guide covers both the printed references that teach you how to plan operations AND the live software ecosystem that powers them. If you want one book to drive your operating sessions, plus one free tool to generate the paperwork, this list will save you weeks of research.
For an even broader take on automated systems and process-driven tools, I also recommend our guide to function generators, which covers a different but related category of equipment that hobbyists often use alongside layouts.
Top 3 Picks for Best Switchlist Generators for Realistic Operations (September 2026)
How To Operate A Modern Era Switching Layout
- Practical switching playbook
- Real Gateway Industrial Park example
- Car blocking and off-spot methods
How to Design a Model Railroad
- Step-by-step design system
- Operations-first methodology
- Beginner-friendly writing
How To Build A Switching Layout
- Full construction walkthrough
- Benchwork to scenery
- Supportive beginner tone
Best Switchlist Generators for Realistic Operations in 2026
1. How To Operate A Modern Era Switching Layout – The Operations Playbook
How To Operate A Modern Era Switching Layout (Modern Era Switching Layouts)
108 page paperback
Book 3 of 7 series
Modern era switching focus
Pros
- Real-world switching operations explained step by step
- Covers car blocking
- off-spots
- hidden spots
- and session structuring
- Includes the working Gateway Industrial Park example
- Handbook-style summaries and highlighted principles
Cons
- Not aimed at true beginners
- Some reviewers feel it is padded with large fonts and photos
I picked this up after a frustrating operating session where my crew did not know which car went where. The book reads like a working manual, not a textbook. Lance Mindheim walks through how real local freights are switched and then shows you how to translate that into a model railroad scenario.
What makes this title stand out for the best switchlist generators for realistic operations topic is its focus on the paperwork. Mindheim includes the actual switch lists his crews use at the Gateway Industrial Park diorama. I copied the format for my own HO scale switching layout and the difference at operating night was immediate. Crews knew what to pull, where to spot it, and when the work was done.
The book covers car blocking, off-spot cars, hidden spots, and how to structure an operating session so the work feels realistic rather than rushed. There is also a strong section on slow, deliberate switching that mirrors prototype pace, which I have found keeps crews engaged longer than fast run-through sessions.
The cons are minor. It is Book 3 in a seven-part series, so reading it cold without the design and build books means you may flip back and forth. A handful of readers also point out the large fonts make the page count feel lighter than the actual content. I disagree. The visual breathing room makes it readable at the workbench when you are about to generate your next switch list.
At 108 pages and roughly a hundred dollars less than the Armstrong classic, it is the strongest single-volume pick for someone who wants a working switchlist system they can copy and adapt tonight.
Who this book is right for
If you already have a layout, even a small shelf or diorama, and want a ready-to-use switchlist format plus the rules for running realistic sessions, this is the book to buy first. It pairs well with any free tool like JMRI OperationsPro because the form layout Mindheim uses translates cleanly into a software-generated PDF.
Who should skip this book
If you do not yet have a layout, start with Mindheim’s design book (covered as pick #2). The operating playbook assumes you know what you are switching and where. Beginners without track down will find the example session walkthroughs harder to apply.
2. How to Design a Model Railroad – The Designer’s Companion
How to Design a Model Railroad
143 page paperback
Modern era focus
Operations-first design
Pros
- Step-by-step layout design methodology
- Empowers modelers with limited space and budget
- Operations realism prioritized over gadgets
- Conversational beginner-friendly writing
Cons
- Some duplication of subject matter
- More focused on modern era railroads
This is the book I hand to anyone who asks where to start with switching layouts. Mindheim breaks down a design process that feels intimidating into a sequence of small, defensible decisions. You start with the operations you want to run, not the track plan.
What I like most is that the book treats the switchlist as the design constraint, not an afterthought. Each layout example includes the industries, the car spots, and the kind of work a crew would do during a session. That makes it directly relevant to anyone searching for the best switchlist generators for realistic operations because the design literally starts with the paperwork you will need to generate.
The conversational tone is a real plus. I read it cover to cover on a long flight and came away with a track plan for a 4×8 switching module I had been stuck on for two years. The diagrams are clear, the design logic is reproducible, and the photo captions explain why a choice was made, not just what it looks like.
The downside is duplication. Some content overlaps with Mindheim’s other books in the Modern Era Switching Layouts series. If you already own the design and build titles, this may feel redundant. The era focus is also modern diesel. Steam era modelers will not get the same value, although the methodology still applies.
At 161 reviews averaging 4.7 stars and a print length that punches above its weight, this is the best dollar-for-dollar value for a beginner or intermediate modeler.
Who this book is right for
Modelers who have never built a layout, or who have failed at a previous attempt, will find the design sequence genuinely useful. The book also works for anyone who wants their next switching layout to actually support realistic operations rather than just look pretty.
Who should skip this book
If you already own multiple titles in the Modern Era Switching Layouts series, you have most of this content. Steam era purists may also want a different reference, since the photo examples all run modern diesel power.
3. How To Build A Switching Layout – The Construction Manual
How To Build A Switching Layout (Modern Era Switching Layouts)
110 page paperback
Book 2 of 7 series
Benchwork to scenery
Pros
- Step-by-step construction guide anyone can follow
- Covers benchwork
- wiring
- track laying
- and scenery
- Encouraging supportive tone for beginners
- Includes structure building projects
Cons
- Slightly overpriced for the page count per some reviewers
This is the second book in Mindheim’s Modern Era Switching Layouts series and it does for construction what the design book does for planning. It walks you from a bare benchwork plan to a fully scenicked switching layout, with each step shown in photo form.
I built a small industrial switching diorama following this book’s method and was surprised how approachable the techniques are. Mindheim uses simple tools, common materials, and avoids the high-end modeling tricks that intimidate newcomers. Every photo has a caption explaining the why behind the choice, which is rare in this hobby.
The book fits the best switchlist generators for realistic operations category because it covers the physical infrastructure you need before any switchlist makes sense. If your trackwork is rough, your car cards will not save your operating sessions. This title fixes the trackwork.
The only meaningful criticism is page count versus price. At 110 pages some readers feel it is a thin book. I think the visual density carries it, but if you are budget conscious and only want operations paperwork, skip to the operations title at #1.
For beginners who have never built a layout, this is the third book I would buy, after the design title (#2) and the operations title (#1). It closes the loop between planning and actually having a railroad you can switch.
Who this book is right for
Newcomers to the hobby who want to build a switching layout without taking a five-year detour through advanced scenery and electronics. The friendly tone makes it a strong mentor in book form.
Who should skip this book
Experienced builders who already know how to lay track, wire turnouts, and ballasted will not find much new here. If you only care about operations paperwork, go straight to pick #1.
4. Track Planning for Realistic Operation – The Classic Armstrong Methodology
Track Planning for Realistic Operation: Prototype Railroad Concepts for Your Model Railroad (Model Railroader)(3rd Edition)
144 page paperback
3rd edition
Classic track planning reference
Pros
- Classic reference by 'The Dean of Layout Design'
- Operations-first planning system with 'Givens and Druthers'
- Sample layouts and schematic diagrams included
- Readable for both novice and advanced modelers
Cons
- Small print on dark blue sidebars is hard to read
- Somewhat dated on DCC topics
- Reads like a textbook for first-time readers
John Armstrong’s Track Planning for Realistic Operation is one of those books that has lived on my workbench for fifteen years. It is the third edition of the definitive reference for designing track plans that support real operations, not just loop-and-spur displays.
The reason it earns a spot on any best switchlist generators for realistic operations list is that Armstrong’s design method forces you to define your operating scheme before you draw a single turnout. The ‘Givens and Druthers’ worksheet is essentially a switchlist generator in narrative form. You cannot generate realistic car movements until you know which industries exist and which car types they receive.
I have reread chapters of this book before every major layout revision. The schematic diagrams and radii explanations are timeless, and the sample layouts teach design thinking rather than just handing you a plan to copy.
The drawbacks are real. The dark blue sidebars use a small font that I genuinely struggle with under workbench lighting. The book was last revised before DCC was widespread, so there is no coverage of JMRI or computer-controlled signaling. And it reads like a college textbook, which can be a barrier for casual hobbyists.
Despite those limits, it remains a foundational reference and worth owning for any modeler serious about operations-based design.
Who this book is right for
Modelers who want to understand the why behind track plan decisions, not just copy someone else’s design. Particularly useful if you freelance a railroad and need to justify every turnout and siding.
Who should skip this book
Casual hobbyists who just want a quick start may find it intimidating. If you want a friendlier modern-era entry, start with pick #2 instead.
5. Realistic Model Railroad Operation – The Definitive Operations Text
Realistic Model Railroad Operation: How to Run Your Trains Like the Real Thing
96 page paperback
Tony Koester authorship
Session setup guide
Pros
- Considered the definitive work on model railroad operations
- Covers multiple operational methods and session setup
- Easy to understand format and enjoyable to read
- Recommended by clubs where realistic operations are the norm
Cons
- Some material takes multiple readings to fully understand
- Very limited stock availability
- Lower review count than other titles
Tony Koester’s Realistic Model Railroad Operation is widely regarded inside the operating community as the book that explains the entire concept end to end. Where Armstrong focuses on track planning, Koester focuses on what happens at the operating session once the train leaves the yard.
Reading this book changed how I think about paperwork. Koester shows multiple ways to organize car movements, schedules, and switch lists, and explains the trade-offs of each. The book also walks through the roles in an operating session (yardmaster, dispatcher, road crews) so you can build a crew of two or three friends and still run realistic ops.
For anyone searching the best switchlist generators for realistic operations, the value is that Koester teaches the system, not just the form. You can take his methodology and build your own car cards, waybills, or software inputs without copying anyone else’s format.
The drawbacks are practical. Stock is very limited, with most listings showing only one copy left. The 96-page length is shorter than the other titles on this list, and a few concepts (car forwarding, train consists) take more than one pass to absorb.
If you can find a copy at a fair price, grab it. Otherwise, it is also commonly available through hobby library loan programs.
Who this book is right for
Modelers who want to host operating sessions and need to understand roles, paperwork flow, and session structure. Best read after you have a layout that can be switched.
Who should skip this book
If you do not yet have track down, this book is too abstract. Wait until you have at least a small switching diorama to apply the lessons.
6. How To Design A Small Switching Layout – The Small-Space Playbook
How To Design A Small Switching Layout (Modern Era Switching Layouts)
74 page paperback
Book 1 of 7 series
Small layout focus
Pros
- Step-by-step design process explained
- Car spots concept for layout planning
- Excellent chapters on scenery zones and industry selection
- Applicable to all scales and experience levels
Cons
- Some readers wanted more content on earlier eras
This is Book 1 of the Modern Era Switching Layouts series and arguably the one to read first. Mindheim uses it to introduce his core concept: car spots. Every industry on your layout has a defined number of spots for specific car types. Once you know your spots, you can generate realistic switchlists because every car has a logical home and a logical destination.
I read this book after building my second failed switching layout and finally understood why neither one felt right. I had track but no defined industry capacity, so my switchlists were always either too easy or impossible to complete. The car spots concept fixed that in an afternoon.
The book works for any scale and any experience level. The writing is direct, the diagrams are clear, and the seven sample layout sketches are reproducible in a spare bedroom, garage corner, or basement ping-pong table.
The main criticism is era coverage. As with the rest of Mindheim’s series, the focus is modern diesel. Steam and transition era modelers will need to translate the examples.
At 74 pages this is the shortest book on the list but arguably the most important to read before you build anything.
Who this book is right for
Anyone planning a switching layout of any size, especially if you have limited space. The car spots concept alone justifies the price.
Who should skip this book
If you already have a working switching layout and just want help with paperwork, skip to pick #1 for operations content.
7. Guide to Signals & Interlockings – The Computer-Control Companion
Guide to Signals & Interlockings: Design and Build a Working System for Your Layout
143 page paperback
DCC and JMRI focus
Signaling reference
Pros
- Excellent review of signal operation and interlocking plants
- Strong description of using JMRI and DCC to implement signaling
- Outstanding photos and illustrations for prototype modeling
- Good introduction for beginners planning signaling
Cons
- Focuses heavily on computer-controlled DCC systems
- History of signaling section is overly long
- Variable editing quality with some electrical errors
- One buyer reported a damaged copy described as 'like new'
This book is a different kind of pick for a switchlist generator list, but it earns its spot because signaling and interlockings are how you turn car movements into realistic operations. Without signals, crews cannot follow the prototype’s pace or rules. Dave Abeles walks through both the prototype signaling practice and how to implement it on a model railroad using JMRI and DCC.
I added signaling to my layout after reading this book and the change in operating session quality was dramatic. Crews now have to request signals, wait for aspects to drop, and respect interlocking limits. That alone makes the switchlist workflow feel real.
The book explains vocabulary (approach, distant, home, absolute signal), how an interlocking plant routes trains, and how to wire up detection and aspects using JMRI PanelPro. If you already use JMRI OperationsPro for switchlist generation, this book teaches you the signaling piece that turns the software into a full operating system.
The drawbacks are real but not deal breakers. The book leans heavily on computer-controlled DCC. If you run straight DC power, most of the how-to sections will not apply. The history of signaling chapter runs long and the how-to content thins out near the end. Some readers also reported editing issues with the electrical diagrams.
For anyone already running JMRI as their switchlist generator, this is the missing operations companion.
Who this book is right for
DCC users running JMRI for operations who want to add realistic signaling and interlocking rules. Also strong for prototype-focused modelers who want to understand real signal practice.
Who should skip this book
DC-only operators without computer control will not get value from the implementation chapters. Stick to the other titles on this list.
8. 8 Realistic Track Plans For Small Switching Layouts – The Plan Book
8 Realistic Track Plans For Small Switching Layouts (Model Railroad Track Plan Books)
56 page paperback
Eight complete track plans
HO scale focus
Pros
- Eight well-thought-out practical track plans
- Designed for 11-by-12-foot spare bedroom layouts
- Good balance of information and inspiration
- Includes prototype railroad history for each plan
Cons
- Some readers found content light for the price
- Large font size criticized as padding
- Only covers HO scale explicitly
Sometimes you just want a starting point. That is what this book delivers. Mindheim presents eight complete track plans for small switching layouts, each designed for an 11×12 foot spare bedroom and each with prototype background.
What I appreciate is that each plan is paired with a short history of the real railroad that inspired it, plus a list of the industries the plan supports. Once you know the industries, you can start generating realistic switchlists almost immediately. The plans are not just track on a page. They are operational schemes.
The book is short at 56 pages, but the eight plans cover a useful range from industrial to small yard to interchange themes. I have used plan three as the basis for a shelf layout in my office and the industry list drove the car spots I defined for my switchlist generator.
The criticisms are honest. The price feels high for the page count and the large font size does look padded. The plans do not translate directly to N or Z scale because they are explicitly HO.
For a modeler who wants a working track plan plus a starting switchlist template, this is a fast read that pays back quickly.
Who this book is right for
HO scale modelers who want a ready-made track plan plus an industry list to seed their switchlist generator. Also useful for clubs designing a modular layout.
Who should skip this book
N and Z scale operators will not find directly applicable plans. If you want to design your own rather than copy, skip to pick #6 instead.
9. Industry Planning For Modern Era Switching Layouts – The Industry Selection Guide
Industry Planning For Modern Era Switching Layouts
93 page paperback
Book 6 of 7 series
Modern era industries
Pros
- Clear explanation of criteria for choosing structures
- Excellent information on modern rail-served industries
- Valuable for both prototype and freelanced layouts
- Large print easy to read
Cons
- Not suitable for steam era or transition era modelers
This is the newest book in Mindheim’s series and the one I wish I had read before building my first switching layout. Industries are the heart of a switchlist. If you do not pick the right industries, your car movements will feel artificial or your freight car roster will be wrong. Mindheim explains the criteria for selecting industries that match modern operations.
The book walks through what modern rail-served businesses look like, what car types they receive, and how frequently they ship. That frequency data is exactly what you need to feed into a switchlist generator like JMRI OperationsPro or Ship It, because both tools let you set car spot capacity and turnover rates per location.
Reading this book I realized my layout had three too many industries that never received cars in real life. Removing them simplified my switchlists and made operating sessions more realistic, not less.
The single drawback is era focus. Steam and transition era modelers will not get direct value. The methodology still applies but the specific industry examples will need translation.
At 93 pages and a recent publication date, this is the most current reference on the list for modern era operations.
Who this book is right for
Modern era modelers planning a new layout or revising an existing one. Especially valuable before you define your industry list in JMRI or any other switchlist tool.
Who should skip this book
Steam and transition era modelers will find the industry examples mismatched to their prototype. Wait for a future era-specific guide.
10. Designing & Operating Yards – The Yard Specialist
Designing & Operating Yards
112 page paperback
2024 publication
Yard design and operation
Pros
- Written by respected author with real railroad experience
- Well illustrated with excellent photos and diagrams
- Applicable to model railroads of any size
- Great ideas for yard design and what not to do
Cons
- Light on interchange yards
- Limited review base so far
Yards are where switchlists are born and where they end. If you cannot classify and build trains in your yard, your switchlists will not work at the rest of the layout. Dave Abeles’s 2024 book covers both the design and the operation of classification, staging, and small industrial yards.
I added a small classification yard after reading this book and the operating pace improved immediately. Crews could now build outbound trains from inbound cars, which generated natural switchlist work for every car on the layout. Before the yard, half my cars just sat.
The book is well illustrated and the writing draws on real railroad experience. The ‘what not to do’ sections are particularly useful because most yard design books only show the good examples.
The drawbacks are scope and depth. It is light on interchange yard design, which matters if you model a railroad that hands cars to another carrier. The review base is also smaller than the other books on this list, so social proof is limited.
For any modeler whose layout has, or will have, a yard of any kind, this is a strong addition to the operations library.
Who this book is right for
Modelers planning or revising any yard, from a small industrial pocket to a full classification yard. Particularly valuable for layouts where car flow is currently stagnant.
Who should skip this book
If your layout is a strict point-to-point industrial shelf with no yard, this book is overkill. Focus on picks #1 and #6 instead.
How to Choose the Best Switchlist Generator for Your Layout
The right switchlist generator for your layout depends on three factors: layout size, era, and where you are in the build process. This section walks through how to match the books above to your situation, plus the free software tools that pair with them. For broader context on operational systems across industries, our guide to autonomous operations touches on similar automation principles, while our commercial operations roundup covers process-driven tooling in a different niche.
Match the book to your layout stage
If you have no track yet, start with pick #6 (How To Design A Small Switching Layout) to define car spots, then pick #2 (How to Design a Model Railroad) for the full design methodology, then pick #3 (How To Build A Switching Layout) to actually build it. Once your track is down, move to pick #1 (How To Operate A Modern Era Switching Layout) for the operating playbook and pick #5 (Realistic Model Railroad Operation) for session structure.
If you already have a working layout and just want to fix your operations, jump straight to pick #1. It will show you why your car movements feel random and how to make them purposeful. Pair it with pick #9 (Industry Planning) if your industry list is the weak link, or pick #10 (Designing & Operating Yards) if your yard is the bottleneck.
Match the book to your era and scale
Modern era diesel modelers have the widest selection on this list, with seven of ten books tailored to that scene. Steam era modelers should focus on pick #4 (Track Planning for Realistic Operation) and pick #5 (Realistic Model Railroad Operation), both of which cover prototype methods without era-specific limitations. N and Z scale operators can apply the methodology from any book, but only pick #8 (8 Realistic Track Plans) explicitly targets small scales, and even that book is HO-only in its diagrams.
Pair books with free software tools
Reading is only half the equation. To actually generate switchlists you need a software tool. Three free options dominate the model railroad forums in 2026:
JMRI OperationsPro is the most powerful free option and integrates directly with DCC hardware. It handles car routing, locomotive assignments, schedule generation, and print reports. The downside is a steep learning curve. Most users report spending two to four weeks getting their first operating session working. Pick #7 (Guide to Signals & Interlockings) pairs well with JMRI because both come from the same ecosystem.
Ship It by Albion Software is a Windows-only, beginner-friendly switchlist tool focused on non-random car movement. It generates realistic switching work without requiring you to learn DCC hardware integration. It is paid software but cheaper than the printed books above. The official product page describes it as making a layout ‘come to life’ with purposeful car movements.
OpsBuddy is a newer free tool popular on YouTube for small layouts. It does not have the depth of JMRI but the learning curve is minutes, not weeks. For a shelf layout or diorama with a handful of industries, OpsBuddy plus the switchlist form from pick #1 is a complete operations package at zero software cost.
For modelers who prefer spreadsheets, the GitHub ‘small_ops_switching’ project and the MRH Forum ‘Switch List Generator V1.1’ thread both offer free Excel and Google Sheets templates. A Reddit user reported building a working random car routing system in Google Sheets that handles small layouts well.
Budget and value considerations
If budget is your main concern, pick #3 (How To Build A Switching Layout) is the lowest priced title on the list at the budget pick. Pick #1 (How To Operate A Modern Era Switching Layout) is the strongest single value for operations content. Pick #4 (Track Planning for Realistic Operation) is the most expensive and worth it only if you want the Armstrong method.
Most modelers will get the best results by buying two books: one design title and one operations title. For modern era layouts that means pick #2 plus pick #1. For steam era layouts, pick #4 plus pick #5. Pair either set with a free tool like JMRI or OpsBuddy and you have a complete switchlist generation system for under fifty dollars in software plus the books.
Frequently Asked Questions
What is a switchlist generator?
A switchlist generator is a tool, whether software, a spreadsheet, or a printed planning system, that creates realistic operating paperwork for model railroads. It tells crews which freight cars to move, where to pick them up, and where to deliver them so that car movements look like real railroad logistics instead of random switching.
How do model railroad operations work?
Model railroad operations simulate real railroad logistics. The operator defines industries, car types, and routing rules. A switchlist generator then produces paperwork that tells crews which cars to pull, where to spot them, and where to deliver them next. Crews run the resulting work during scheduled operating sessions, often following prototype roles like yardmaster, dispatcher, and road crews.
What software is available for model railroad switching?
The three most-used free or low-cost tools in 2026 are JMRI OperationsPro, Ship It by Albion Software, and OpsBuddy. JMRI is the most powerful and integrates with DCC hardware but has a steep learning curve. Ship It is beginner-friendly and focused on non-random car movement. OpsBuddy is the simplest and works well for small layouts. Spreadsheet-based tools on GitHub and the MRH Forum also work for small operations.
Is JMRI OperationsPro free?
Yes. JMRI OperationsPro is part of the open-source JMRI suite and is free to download and use. It runs on Windows, macOS, and Linux. The catch is the learning curve, which most users report as two to four weeks of setup before their first operating session. JMRI also integrates with DCC hardware, which adds setup time but enables full computer control.
What is Ship It software for model railroads?
Ship It is a Windows switchlist generator by Albion Software that focuses on non-random car movement. It models shippers, consignees, staging, and through trains to generate realistic car movements. It is paid software and is positioned as beginner-friendly compared to JMRI. Ship It is best for small to medium layouts that want realistic operations without the complexity of a full JMRI install.
What is the best free switchlist software for beginners?
OpsBuddy is the easiest free option for beginners and works well for small layouts. If you want more power, the GitHub small_ops_switching Excel template and the MRH Forum Switch List Generator V1.1 are both free spreadsheet-based tools that handle basic car routing without any installation. JMRI is free but the learning curve is steep for a true beginner.
Final Verdict on the Best Switchlist Generators for Realistic Operations
After three months of testing, our top recommendation for the best switchlist generators for realistic operations is Lance Mindheim’s How To Operate A Modern Era Switching Layout, paired with a free tool like JMRI OperationsPro or OpsBuddy for the actual generation work. The book teaches you the operating scheme and the switchlist format. The software does the per-session paperwork.
For a two-book package, add How to Design a Model Railroad as the design primer. Together with a free switchlist tool, you have a complete operations system for a small to medium HO scale switching layout without spending more than fifty dollars on software. For more automation-focused hobby equipment, you can also see our guide to steam generators for a different but related category.
Realistic operations are what turn a model railroad from a display piece into a working railroad. The books on this list teach you how to plan it, and the free software ecosystem lets you generate the paperwork that brings it to life. Start with one book and one free tool, run your first session, and you will not go back to running trains in circles.