The following functions are part of the Standard package:

abs
acos
asin
atan
atan2
cd
clock
cos
cosh
disp
Evaluate
exists
find
format
GetErrorCount
getlength
GetWarningCount
int
length
mean
members
mod
pwd
rand
real
replace
sign
sin
sinh
size
split
sqrt
string
strrev
substring
tan
tanh
trim
typeof
what
who

See Also: Functions, Phantom Package