FOL uses different keywords to bind functionality and data to variables.
modules
used for: imports and includes
use[]
definitions
used for: preporcesr, macros, blocks, definitions …
def[]
variables
used for all variables: ints, strings, bools, arrays, vecotrs …
var[]
functions
used for subporgrams: procedures and functions
pro[]
fun[]
log[]
constructs
used for: new types, records, objects, interfaces, enums …
typ[]
std[]