Currently not all of Zap's documentation is online. It doesn't all apply to the same version, either...
Technical.!ReadMe
Technical.E-Command
Technical.E-Cursors
Technical.E-Entry
Technical.E-File
Technical.E-Flags
Technical.E-Keycodes
Technical.E-Menu
Technical.E-Vars
Technical.E-Windows
Technical.E-Zapcalls
TechCode.E-Library
TechCode.E-Template