Similar to エコー_(コンピュータ)

Rich Communication Services

Forward-confirmed reverse DNS

Ar (Unix)

AWK

Bc (programming language)

Cal (command)

Cat (Unix)

Cd (command)

Chgrp

Chmod

Chown

Cksum

Cmp (Unix)

Cp (Unix)

Cron

Ctags

Cut (Unix)

Dd (Unix)

Diff

Dirname

Du (Unix)

Ed (software)

Env

Eval

Expr

File (command)