global.lua is best place to start
You also have the LUA codeset for above and beyond. (such as io, arrays etc.)
EDIT: If you look into gameguru\docs there are some PDF's you can access. Also check the Community Guides at Steam.
Development/ Gaming Rigs
Sys 1: i7-4770 (3.5)/16Gb/128 SSD/3Tb/970gtx/2 x 23, 1 x 27 LCD - Sys 2: i7/8Gb/670gtx/1.5Tb/1 x 23 LCD - Sys 3: Amd Quad/8Gb/645gtx/1Tb/30" LCD