Projections are grouped by use, and ordered roughly chronologically by type.
Information primarily from Carlos Furuti, ESRI, USGS, Mathworks, and Snyder’s Flattening the Earth.

Your raster file (like TIFF/GeoTIFF, MrSID, ECW, JPEG2000, JPEG, PNG) is converted into a directory structure of small tiles (TMS compatible), which you can just copy to the webserver.