├── images ├── pdb.sketch ├── pdb_image.jpg └── pdb_img.svg ├── contributing.md └── README.md /images/pdb.sketch: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/altryne/awesome-product-design/master/images/pdb.sketch -------------------------------------------------------------------------------- /images/pdb_image.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/altryne/awesome-product-design/master/images/pdb_image.jpg -------------------------------------------------------------------------------- /contributing.md: -------------------------------------------------------------------------------- 1 | # Contribution Guidelines 2 | 3 | Ensure your pull request adheres to the following guidelines: 4 | 5 | - Only submit something unique and generally useful. 6 | - Search previous suggestions before making a new one. 7 | - Make an individual pull request for each suggestion. 8 | - Use the following format: `[package](link): Description.` 9 | - Additions should be added to the bottom of the relevant category. 10 | - Keep descriptions short and simple. 11 | - Start the description with a capital. 12 | - Check your spelling and grammar. 13 | - Make sure your text editor is set to remove trailing whitespace. 14 | - New categories or improvements to the existing categorization are welcome. 15 | 16 | Thank you for your suggestion! :metal: 17 | -------------------------------------------------------------------------------- /images/pdb_img.svg: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Group 3 5 | Created with Sketch. 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Awesome Product Design [![Awesome](https://awesome.re/badge-flat2.svg)](https://awesome.re) 2 | 3 | 4 | 5 | 6 | 7 | > A collection of bookmarks, resources, articles for product designers. 8 | 9 | [Digital product design](https://en.wikipedia.org/wiki/Digital_product_design) is an iterative design process to solve a functional problem with a formal solution. A digital product designer identifies a real problem, offers the best possible solution, and launch it to a market that is showing demand for that particular solution. 10 | 11 | Feel free to [add something interesting](contributing.md) by pull request. 12 | 13 | ## Contents 14 | - [Research](#research) 15 | - [UX](#ux) 16 | - [UI](#ui) 17 | - [Visual](#visual) 18 | - [Prototype](#prototype) 19 | - [Accessibility](#accessibility) 20 | - [Writing](#writing) 21 | - [Data](#data) 22 | - [IoT](#iot) 23 | 24 | ## Research 25 | #### Methods 26 | ###### Research Plan 27 | - [Smashing Magazine](https://www.smashingmagazine.com/2012/01/ux-research-plan-stakeholders-love/) - The UX Research Plan That Stakeholders Love. 28 | - [NN Group](https://www.nngroup.com/articles/pm-research-plan/) - Project Management for User Research: The Plan. 29 | - [Interaction Design](https://www.interaction-design.org/literature/article/a-one-page-user-research-plan) - One Page User Research Plan. 30 | ###### User Interview 31 | - [NN Group](https://www.nngroup.com/articles/interviewing-users/) - Despite many weaknesses, interviews are a valuable method for exploratory user research. 32 | - [UXDesign.cc](https://uxdesign.cc/how-to-get-the-most-out-of-user-interviews-c5d0cd4499b5) - How to Get the Most Out of User Interviews. 33 | ###### Stakeholder Interviews 34 | - [Boxes and Arrows](http://boxesandarrows.com/a-stakeholder-interview-checklist/) - Cheat Sheet For Interviewing Stakeholders. 35 | - [UX Apprentice](https://www.uxapprentice.com/resources/stakeholder-interview-template/) - Stakeholder Interview Template. 36 | - [Interaction Design](https://www.interaction-design.org/literature/article/preparing-for-ux-stakeholder-interviews) - Preparing for UX Stakeholder Interviews. 37 | ###### Research Synthesis 38 | - [UX Movement](http://uxmovement.com/thinking/how-to-turn-user-research-into-usable-data/) - How to Turn User Research into Usable Data. 39 | - [SlideShare](https://www.slideshare.net/HJKwon3/design-research-synthesis) - Design Research Synthesis. 40 | - [Medium](https://medium.com/product-labs/using-trello-for-user-research-synthesis-fb1abdfc7c4b) - Using Trello for User Research Synthesis. 41 | - [Tuts+](https://webdesign.tutsplus.com/tutorials/how-to-prepare-and-use-an-affinity-diagram--cms-28388) - How to Prepare and Use an Affinity Diagram. 42 | - [Medium](https://medium.com/learning-ux/affinity-diagrams-tips-and-tricks-6225e8c1f0df) - Affinity Diagrams: Tips and Tricks. 43 | ###### Competitive Analysis 44 | - [Xtensio](https://xtensio.com/how-to-create-a-competitive-analysis/) - How To: Create A Competitive Analysis. 45 | - [Hootsuite](https://blog.hootsuite.com/the-ultimate-competitive-analysis-template/) - Competitive Analysis Template To Help You Outsmart The Competition. 46 | ###### Job to be Done 47 | - [Intercom](https://blog.intercom.com/using-job-stories-design-features-ui-ux/) - Designing features using Job Stories. 48 | - [JTBD](https://jtbd.info/replacing-the-user-story-with-the-job-story-af7cdee10c27) - Replacing The User Story With The Job Story. 49 | ###### Personas 50 | - [Usability.Gov](https://www.usability.gov/how-to-and-tools/methods/personas.html) - The purpose of personas is to create reliable and realistic representations of your key audience. 51 | - [UX Mag](https://uxmag.com/articles/personas-the-foundation-of-a-great-user-experience) - Personas: The Foundation of a Great User Experience. 52 | - [Tuts+](https://webdesign.tutsplus.com/articles/defining-and-applying-personas-to-ux-design--webdesign-7561) - Defining And Applying Personas to UX Design. 53 | ###### Empathy Map 54 | - [UX Pin](https://www.uxpin.com/studio/blog/the-practical-guide-to-empathy-maps-creating-a-10-minute-persona/) - The Practical Guide to Empathy Maps: 10-Minute User Personas. 55 | - [Boagworld](https://boagworld.com/usability/adapting-empathy-maps-for-ux-design/) - Adapting empathy maps for UX design. 56 | ###### Storyboard 57 | - [UX Magazine](http://uxmag.com/articles/storyboarding-in-the-software-design-process) - Storyboarding in the Software Design Process. 58 | - [Medium](https://uxplanet.org/storyboarding-in-ux-design-b9d2e18e5fab) - Storyboarding in UX Design. 59 | - [Johnny Holland](http://johnnyholland.org/2011/10/storyboarding-ux-part-1-an-introduction/) - Storyboarding & UX. 60 | - [NN Group](https://www.nngroup.com/articles/customer-journey-mapping/) - When and How to Create Customer Journey Maps. 61 | - [UX Lady](http://www.ux-lady.com/experience-maps-user-journey-and-more-exp-map-layout/) - Experience maps, user journeys and more. 62 | - [Smashing Magazine](https://www.smashingmagazine.com/2015/01/all-about-customer-journey-mapping/) - All You Need To Know About Customer Journey Mapping. 63 | - [Medium](https://medium.com/@wnialloconnor/how-to-build-an-experience-map-5e55b7ee4f32) - How to build an experience map. 64 | #### Articles 65 | - [Smashing Magazine](https://www.smashingmagazine.com/2013/04/rainbow-spreadsheet-collaborative-ux-research-tool/) - The Rainbow Spreadsheet: A Collaborative Lean UX Research Tool. 66 | - [Coglode](http://coglode.com/) - Bite-size behavioral research analysis. 67 | #### Testing 68 | - [User Testing](https://www.usertesting.com/) - Unlock customer insights and increase your revenue. 69 | - [Optimal Workshop](https://www.optimalworkshop.com/) - User Research Platform that helps you and your team make design decisions with confidence. 70 | - [Measure Success](https://www.sitepoint.com/how-do-you-measure-the-success-or-failure-of-your-ux-design/) - How Do You Measure the Success (or Failure) - of Your UX Design?. 71 | - [UX Metrix](http://www.dtelepathy.com/ux-metrics/#intro) - How to Choose the Right UX Metrics for Your Product. 72 | - [Lookback](https://lookback.io/) - Simple, powerful user research. 73 | - [Appsee](https://www.appsee.com/) - Appsee's app analytics platform provides an in-depth analysis of your users' behavior. 74 | - [Full Story](https://www.fullstory.com/) - What do you want to know about your customer experience?. 75 | - [Desinion](http://www.desinion.com/) - Make smart and informed design decisions for your company, or your client's company. 76 | - [Survey Monkey](https://www.surveymonkey.com/) - Turn instincts into insights. 77 | - [Google Surveys](https://www.google.com/analytics/surveys/#?modal_active=none) - Make better decisions with market research. 78 | - [Typefrom](https://www.typeform.com/) - Goodbye forms. Hello typeforms. 79 | - [Etnio](https://ethn.io/) - Intercept Real People for User Research. 80 | - [Calendly](https://calendly.com/) - Calendly helps you schedule meetings without the back-and-forth emails. 81 | 82 | ## UX 83 | #### Guidelines 84 | - [The UX Bookmark](http://www.theuxbookmark.com/) - Collection of the best UX websites from across the globe. 85 | - [Gov.Uk](https://www.gov.uk/service-manual/) - Helping government teams create and run great digital services. 86 | - [Methods 18F](https://methods.18f.gov/) - Collection of tools to bring human-centered design into your project. 87 | - [Guides 18F](https://guides.18f.gov/) - 18F Guides is the repository for best practices across our teams. 88 | - [Usability.Gov](https://www.usability.gov/) - Improving the User Experience. 89 | - [Medial Lab Amsterdam](http://medialabamsterdam.com/toolkit/) - Design method toolkit. 90 | - [Design Kit IDEO](http://www.designkit.org/methods) - Step-by-step guide to unleashing your creativity. 91 | - [Gamestorming](http://gamestorming.com/) - Gamestorming is a set of co-creation tools used by innovators around the world. 92 | #### Articles 93 | - [UX Magazine](http://uxmag.com/) - UX Magazine is a free community resource exploring all facets of experience design. 94 | - [UX Both](http://www.uxbooth.com/) - The UX Booth is a publication by and for the user experience community. 95 | - [UX Mastery](http://uxmastery.com/) - We help user experience professionals get started and get better. 96 | - [UX Myths](http://uxmyths.com/) - Build your product based on evidence, not false beliefs. 97 | - [A List Apart](https://alistapart.com/) - List Apart explores the design, development, and meaning of web content. 98 | - [52 Weeks of UX](http://52weeksofux.com/) - Discourse on the process of designing for real people. 99 | - [UX Pin](https://www.uxpin.com/studio/) - Guides, articles and ebooks that explore all facets of UX Design. 100 | - [The IxD Library](http://theixdlibrary.com/) - Collection of materials related to Interaction Design. 101 | - [LukeW](https://www.lukew.com/ff) - Publications on the critical details and big picture behind digital product design. 102 | - [NN Group](https://www.nngroup.com/articles/) - Evidence-Based User Experience Research, Training, and Consulting. 103 | - [Cooper](https://www.cooper.com/journal/) - Blog about design, business, and the world we live in. 104 | - [Information Design](http://www.informationdesign.org/) - InfoDesign Hand-picked since 1997. 105 | - [Intercom](https://blog.intercom.com/) - Design, Customer Success, & Startup Blog. 106 | - [UXDesign.cc](https://uxdesign.cc/) - User Experience, Usability, Product Design. Follow the UXDesign.cc. 107 | - [UX Reactions](http://uxreactions.com/) - Fun stuff. 108 | #### Tools 109 | - [UX Recipe](http://uxrecipe.github.io/) - This project is a personal manifesto against the objectification of the term "UX". 110 | - [UX Checklist](http://uxchecklist.github.io/) - UX Project Checklist. 111 | - [UX Stackexchange](https://ux.stackexchange.com/) - UX Stack Exchange is a question and answer site. 112 | 113 | ## UI 114 | #### Guidelines 115 | - [Ant Design](http://ant.design) - An UI design language for enterprise applications. 116 | - [iOS Guidelines](https://developer.apple.com/design/) - Get in-depth information and UI resources for designing great apps that integrate seamlessly with Apple platforms. 117 | - [Google Material](https://material.io/) - Material Design is a unified system that combines theory, resources, and tools for crafting digital experiences. 118 | - [Google Design](https://design.google.com/) - Google Design is a cooperative effort led by a group of designers, writers, and developers at Google. 119 | - [Facebook Design](http://facebook.design/) - Collection of articles, videos, and resources made by designers at Facebook. 120 | - [UsTwo](https://ustwo.com/blog/the-ustwo-pixel-perfect-precision-handbook-3/) - Pixel Perfect Precision Handbook 3. 121 | - [Vinsol](http://vinsol.com/blog/2014/11/20/tips-for-designers-from-a-developer/) - Tips for Designers: from a Developer. 122 | #### Inspiration 123 | - [Pttrns](https://pttrns.com/) - The mother of all design resources. 124 | - [Call To Idea](http://www.calltoidea.com/) - Light up your imagination!. 125 | - [Android Niceties](http://androidniceties.tumblr.com/) - Aiming to provide inspiration and insight into Android UI conventions. 126 | - [Lovely UI](http://www.lovelyui.com/) - Collection of mobile UI elements. 127 | - [Brian Lovin](http://www.brianlovin.com/) - Visual exploration of the best products. 128 | - [Inspired UI](http://inspired-ui.com/) - iOS Mobile Apps Design Patterns. 129 | - [Sloppy UI](http://sloppyui.tumblr.com/) - It's all about intellectual honesty, not trolling. 130 | #### Tools 131 | - [Pattern Lab](http://patternlab.io/) - Create atomic design systems with Pattern Lab. 132 | - [Huge](https://hugeinc.github.io/styleguide/index.html) - Tool to make creating and maintaining styleguides easy. 133 | - [Stylify Me](http://stylifyme.com/) - This tool allows the designer to research sites efficiently without the need to inspect each element. 134 | - [Density Bucket](http://density.brdrck.me/) - Density Converter. 135 | - [iDetailAid](http://labs.rampinteractive.co.uk/android_dp_px_calculator/) - Android DP / PX converter. 136 | 137 | ## Visual 138 | #### Resources 139 | - [Design Principles FTW](http://www.designprinciplesftw.com/) - The biggest collection of Design Principles on the Internet. 140 | - [Find Guidelines](http://findguidelin.es/) - The fastest way to brand assets. 141 | - [Style Guides](http://styleguides.io/) - Website Style Guide Resources. 142 | - [Awesome Design Systems](https://github.com/alexpate/awesome-design-systems) - Curated list of design systems, patterns libraries, and everything in between. 143 | - [Instant Logo Search](http://instantlogosearch.com/) - Search & download thousands of logos instantly. 144 | - [Logo Book](http://www.logobook.com/) - Discover the worlds finest logos, symbols & trademarks. 145 | - [Awesome Sketch](https://github.com/diessica/awesome-sketch) - Curated list of awesome Sketch videos, articles, plugins, whatever, for designers, developers, or neither. 146 | #### Icons 147 | - [Use Iconic](https://useiconic.com/) - Meet Iconic. The definitive icon set designed for the modern web. 148 | - [Icon Finder](https://www.iconfinder.com/) - Search through 1,739,045 icons or browse 42,226 icon sets. 149 | - [We Love Icon Font](http://weloveiconfonts.com/) - This is a free & open source icon fonts hosting service. 150 | - [The Noun Project](https://thenounproject.com/) - Icons for everything. 151 | - [Iconmonstr](https://iconmonstr.com/) - Discover 3847+ free simple icons in 263 collections. 152 | #### Font Foundries 153 | - [Open Foundry](http://open-foundry.com/) - New platform for open-source fonts in a noise-free environment. 154 | - [Use & Modify](http://usemodify.com/) - Provide a contemporary set of fonts distributed under libre or open source licences, hand picked by a typography and free culture lover. 155 | - [Font Fabric](http://www.fontfabric.com/) - Fontfabric is an independent type foundry. 156 | - [Font Squirrel](https://www.fontsquirrel.com/) - Free Font Utopia. 157 | - [Play Type](https://playtype.com/) - Browse through our selection of more than a hundred fonts and nearly 500 different font weights. 158 | - [Identyfont](http://www.identifont.com/index.html) - Identify a font by answering questions about key features. 159 | #### Typography 160 | - [NN Group](https://www.nngroup.com/articles/typography-terms-ux/) - Typography Terms Cheat Sheet. 161 | #### Colors 162 | - [Coolors](https://coolors.co/) - The super fast color schemes generator!. 163 | - [Colour Lovers](http://www.colourlovers.com/) - Creative community. 164 | - [Color Hunt](http://colorhunt.co/) - Color Hunt is a social platform for everyone who love colors. 165 | - [Brand Colors](http://brand-colors.com/) - 1100+ color collection available in sass, less, stylus and css. 166 | #### Stock Images 167 | - [Unsplash](https://unsplash.com/) - Free (do whatever you want) - high-resolution photos. 168 | - [StockSnap](https://stocksnap.io/) - Hundreds of high resolution images added weekly. 169 | - [Pixbay](https://pixabay.com/) - Free images and videos you can use anywhere. 170 | - [Jay Mantry](http://jaymantri.com/) - Free pics (CC0). 171 | - [The Stock](http://thestocks.im/) - The best royalty free stock photos are delivered now along with videos, audios, icons, fonts and colors. 172 | - [Get Refe](http://getrefe.tumblr.com/) - Royalty-free, high-quality, Real Life photos. 173 | - [ISO Republic](http://isorepublic.com/) - ISO Republic provides free stock photos for creative professionals. 174 | - [All The Free Stock](http://allthefreestock.com/) - Get all the Free Stock Images, Videos, Music and Icons in one location. 175 | - [Pexels](https://www.pexels.com) - Free stock images in a range of styles including filtered, natural, and commercial. 176 | - [unDraw](https://undraw.co) - Open-source illustrations for every project you can imagine and create. 177 | #### Stock Videos 178 | - [Vimeo](https://vimeo.com/channels/freestockfootage/) - Royalty Free Stock Video for Free Personal, Corporate or Commercial Use. 179 | #### Tools 180 | - [Pattern Lab](http://patternlab.io/) - Create atomic design systems with Pattern Lab. 181 | - [Polar](https://photoeditor.polarr.co/) - Photo Editor. 182 | - [Licecap](http://www.cockos.com/licecap/) - Simple animated screen captures. 183 | - [Hand Brake](https://handbrake.fr/) - HandBrake is a tool for converting video from nearly any format to a selection of modern, widely supported codecs. 184 | - [Skala Color](https://bjango.com/mac/skalacolor/) - Extraordinary color picker for designers and developers. 185 | - [Font Picker](http://www.fontpicker.io/) - Webfont library for your browser. 186 | - [Font Reach](http://www.fontreach.com/) - FontReach scans the top million sites to show font usage across the web. 187 | 188 | ## Prototype 189 | #### Articles 190 | - [The 12 Principles](http://the12principles.tumblr.com/) - The 12 basic principles of animation were developed by the ‘old men’ of Walt Disney Studios. 191 | - [Hoverstat](https://hoverstat.es/) - The home of alternative digital design. 192 | - [Microinteractions](http://microinteractions.com/) - Designing with Details. 193 | - [Motion UI Design](https://github.com/fliptheweb/motion-ui-design) - Resources for inspiration, lists of software, libraries and other stuff related to Motion UI design, animations and transitions. 194 | #### Softwares 195 | - [Pop](https://marvelapp.com/pop/) - POP helps you transform your pen and paper ideas into an interactive iPhone or Android prototype. 196 | - [Invision](https://www.invisionapp.com/) - The world's leading prototyping, collaboration & workflow platform. 197 | - [Marvel](https://marvelapp.com/) - Simple design, prototyping and collaboration. 198 | - [Flinto](https://www.flinto.com/) - Flinto lets designers quickly make interactive prototypes of their mobile, desktop, or web apps. 199 | - [Origami Studio](http://origami.design/) - Explore, iterate, and test your ideas. 200 | - [Framer](https://framer.com/) - All-in-one design workflow. 201 | - [Form](http://relativewave.com/form/) - Build and customize native prototypes directly on device. 202 | - [Proto](https://proto.io/) - Create fully-interactive high-fidelity prototypes that look and work exactly like your app should. No coding required. 203 | - [Fuse](https://www.fusetools.com/) - Create better native apps for iOS and Android with a new breed of development tools. 204 | - [ProtoPie](https://www.protopie.io) - ProtoPie is the easiest prototyping tool to build advanced, highly interactive prototypes. 205 | 206 | #### Tools 207 | - [Lottie](https://airbnb.design/lottie/) - Easily add high-quality animation to any native app. 208 | - [Keynotopia](http://keynotopia.com/) - Keynotopia transforms Keynote and PowerPoint into the best rapid prototyping tools for creating mobile, web and desktop UI mockups. 209 | 210 | ## Accessibility 211 | #### Articles 212 | - [Gov.Uk](https://www.gov.uk/service-manual/helping-people-to-use-your-service/making-your-service-accessible-an-introduction) - Making your service accessible: an introduction. 213 | - [Smashing Magazine](https://www.smashingmagazine.com/2014/10/color-contrast-tips-and-tools-for-accessibility/) - Color Contrast And Why You Should Rethink It. 214 | - [Medium](https://medium.com/@GarronEngstrom/accessibility-101-56f87f3d726e) - Accessibility for designers. Mind your RGB’s. 215 | - [Web Credible](https://www.webcredible.com/blog/visual-design-and-colour-accessibility/) - Visual design and color accessibility. 216 | - [A List Apart](https://alistapart.com/blog/post/easy-color-contrast-testing) - Easy Color Contrast Testing. 217 | - [Viget](https://www.viget.com/articles/color-contrast) - Color Contrast for Better Readability. 218 | #### Tools 219 | - [WAVE](http://wave.webaim.org/) - Web Accessibility Evaluation Tool. 220 | - [Contrast Ratio](http://6220119.github.io/contrast-ratio/#/black-on-white) - A tool to calculate the contrast ratio between any two valid CSS colors. 221 | - [Snook](https://snook.ca/technical/colour_contrast/colour.html#fg=515A5F,bg=FFFFFF) - Colour Contrast Check. 222 | - [CanvasFlip](https://www.canvasflip.com/color-blind.php) - Colorblind simulator for Designers. 223 | 224 | ## Writing 225 | - [Google trends](https://trends.google.com/trends/) - Stories trending now. 226 | - [Google Ngram](https://books.google.com/ngrams/) - Enter phrases into the Google Books Ngram Viewer, it displays a graph showing how those phrases have occurred in a corpus of books. 227 | - [Hemingway](http://www.hemingwayapp.com/) - Hemingway App makes your writing bold and clear. 228 | - [Readable](https://readable.io/) - You have 7 seconds to grab someone's attention. Readable.io helps you cut out the noise. 229 | - [The Writer](http://www.thewriter.com/what-we-think/readability-checker/) - How readable is your writing?. 230 | - [Taskade](https://www.taskade.com/) - Collaborative editor and outliner. 231 | 232 | ## Data 233 | - [London Datastore](https://data.london.gov.uk/) - The London Datastore is a free and open data-sharing portal. 234 | - [YouGov](https://yougov.com/) - We believe in the power of participation. 235 | - [Data.Gov](https://data.gov.uk/) - Find data published by government departments and agencies, public bodies and local authorities. 236 | - [The Tate Collection](https://github.com/tategallery/collection) - Here we present the metadata for around 70,000 artworks. 237 | - [NASA](https://open.nasa.gov/open-data/) - We're Setting Data, Code and APIs free. 238 | 239 | ## IoT 240 | #### Articles 241 | - [IoT Manifesto](https://www.iotmanifesto.com/) - Guidelines for responsible design in a connected world. 242 | - [IoT Weekly News](http://iotweeklynews.com/) - Subscribe to hand picked articles by Justin Grammens on the Internet of Things. 243 | - [IoT Agenda](http://internetofthingsagenda.techtarget.com/feature/Design-an-IoT-user-experience-not-an-IoT-product) - Design an IoT user experience, not an IoT product. 244 | - [IoT For All](https://iot-for-all.com/designing-the-internet-of-things/) - Designing the Internet of Things – 5 Key Principles. 245 | #### Tools 246 | - [Node RED](http://nodered.org/) - Flow-based programming for the Internet of Things. 247 | - [Noodl](http://www.getnoodl.com/) - Digital Experience Design Platform. 248 | 249 | ## License 250 | [![CC0](http://mirrors.creativecommons.org/presskit/buttons/88x31/svg/cc-zero.svg)](https://creativecommons.org/publicdomain/zero/1.0/) 251 | --------------------------------------------------------------------------------