…
..
abbrev
base64
bigdecimal
bigmath
cgi
complex
conditionvariable
coverage
csv
date
datetime
delegate
digest
drb
English
erb
etc
expect
fiber
find
getoptlong
ipaddr
logger
mathn
matrix
net
observer
open3
openssl
openstruct
optionparser
pathname
pp
prime
readline
resolv
rexml
scanf
securerandom
set
shellwords
singleton
socket
stringio
stringscanner
syslog
tempfile
thread
time
timeout
tmpdir/dir
uri
weakref
win32ole
yaml
zlib