Navigating the LEX (Navigation Category Definitions)   The STEX (ST) is pretty easy to understand as there are very few sections to search: 3ds Models, Buildings (BAT), Lots, Maps, Props, Textures, Mods & Tools.  The PLEX (simpeg site) is quite different but even though the acronyms are not obvious, clicking them always opens a description page to explain.  The LEX, however, has the most easy to browse categories and while they are mostly easy to understand, there are a few that still elude me (even after searching for definitions on the sc4d site).  There is amazing content found at all 3, as well as some other sites out there that I'm still finding out about.    Does anyone know the definition of the category headers below marked in Red text?  Appreciate any help.  Thx!   00 Locked -- Locked (for a reason), not downloadable, may want to reconsider if using in your game [Empty] 00 Outdated -- Newer versions exist, these are not downloadable, may want to get the new version for your game 3 Rivers Region Co - Assuming it was a set by someone that is no longer supported [Empty] CAM Agricultural -- Farm-related that are CAM-patible, meaning work with the CAM and likely only with CAM mod CAM Commercial Off -- Commercial Offices that work with the CAM and likely only with CAM mod installed CAM Commercial Ser -- Commercial Services that work with the CAM and likely only with CAM mod installed CAM Industrial -- Industrial-related that work with the CAM and likely only with CAM mod installed CAM Main Files -- The files required to install the CAM mod (to change the game to allow massive sized cities/buildings) CAM Residential -- Residential-related that work with the CAM and likely only with CAM mod installed   Civics - Education -- Schools & education buildings that actively help increase your residential sims' Education (EQ) Civics - Health -- Hospitals & Medical Clinics that actively help increase your residential sims' Health (HQ) Civics - Safety -- Police & Fire Stations that actively reduce city flammability and crime   Commercial -- Commercial buildings that did not fall in one of the other more specific commercial categories [below] Commercial - Highr -- Commercial High Rises Commercial - Mediu -- Medium-sized Commercial buildings Commercial - MEGA -- Extremely large Commercial buildings that take a significant amount of land Commercial - Small -- Small Commercial buildings that could fit in any city Commercial - WFW -- Wall-to-Wall Commercial buildings, fit side-by-side, building takes the entire lot, no extra land  Commercial - WFK -- Waterfront Kit Commercial buildings, designed to sit on land by water   Dependency -- Large mixed packs of Dependencies needed for the buildings in the other categories Dependency - Props -- Prop Packs needed as dependencies for the buildings in the other categories Dependency - Textu -- Texture Packs  needed as dependencies for the buildings in the other categories Documentation -- Various Tutorials and Documentation, helpful for both modders and players   Farming -- Agriculture Farms & Fields Farming - SF -- Slope Friendly Agriculture Farms & Fields, look decent when built on any slope tile   Industrial -- Assorted Industrial buildings  Industrial - MEGA -- Extremely large Industrial buildings that take a significant amount of land Industrial - WFK -- Waterfront Kit Industrial buildings,  designed to sit on land by water   Landmarks -- Landmark buildings that provide the Landmark effect in the game Landmarks - Functi -- Functional Landmarks, meaning they have jobs or do other things for your city   Map - Standard --  Maps that come as standard greyscale JPEG images that are rendered in the game Map - Terraformer -- Maps that come as a Terraformer/Mapper file   Models - 3DS -- Models made with the 3DSMax tool, available for use on custom lots Models - gMax -- Models made with the gMax tool, available for use on custom lots   Mods - General -- Mods that change features of the game, similar to the Mods category on the STEX Mods - Graphic -- Mods that change visual look and feel (graphic) aspects of the game (eyecandy) Mods - Traffic -- Mods that change vehicles and transportation networks in the game NAM -- Most popular mod of all time, adds additional transportation features to the game, upgrades capacities, fixes bugs   Parks -- Parks that don't fit into other categories, found in Parks menu, give Park Effect, new animal mods found here too Parks - BSC Compli -- ???? (Unsure what this means. Anyone know? BSC compliant or something?) Parks - Eyecandy -- Parks for looks only, not functional in the game.  Parks - Sportsfield -- Various kinds of Ball Parks and Sports Fields   Residential - High -- Residential High Rises Residential - Medi -- Medium-sized Residential buildings Residential - MEGA -- Extremely large Residential buildings that take a significant amount of land Residential - SF -- Slope Friendly Residential buildings, look decent when built on any slope tile Residential - Smal -- Small Residential buildings that could fit in any city   Rewards - BTE -- BSC Tracking Reward buildings. a special set of rewards programmatically linked together Rewards - General -- New Reward buildings that will become available in Rewards menu when requirements are met   Tools - Data Creat -- Tools used for Data Creation, useful for batters/lotters, not needed for those who only play  Tools - Data Manag -- Tools for Data Management, advanced users can make good use of these Tools - Data Modif -- Tools used for Data Modification, useful for modders, not needed for those who only play    Transport - Air -- New Airplane skin mods, add new airplanes to the game Transport - Rail -- New Rail Stations for trains and trams Transport - Road -- New Road Transit stations like bus stations and parking lots Transport - Water -- New Ships and boats   Utilities - Garbag -- Garbage Utility buildings of all styles Utilities - Power -- Power Utility buildings of all styles Utilities - Water -- Water Towers and Pumps     These are the current options as of 2013.  Perhaps this list will be useful for others besides me.  If anyone suggests a more accurate description to any category above, it will be updated.  If others find this useful, perhaps I'll add the PLEX categories here as well. Appreciate any help with the Red ones above. Thx!   EDIT: Thanks to infamousjbe, Indiana Joe, z1, catty-cb for helping answer the questions. Clarified categories are now shown in Green instead of red above.