Array
Float
Integer
String
at_exit
autoload
binding
caller
catch
chop
chop!
chomp
chomp!
eval
exec
exit
exit!
fail
fork
format
gets
global_variables
gsub
gsub!
iterator?
lambda
load
local_variables
loop
open
p
print
printf
proc
putc
puts
raise
rand
readline
readlines
require
select
sleep
split
sprintf
srand
sub
sub!
syscall
system
test
trace_var
trap
untrace_var