A
- a2engine
- a2p
- a2ps
- aaaa
- aaflip
- aaxine
- abacus
- abiword
- abook
- abw2html.
- acat
- access
- aclocal
- aclocal-1.4
- acpi_available
- acroread
- adaboost
- addftinfo
- addr2line
- addr-birthday
- addr-email
- address
- addressbook
- amazon
- amp
- amstex
- an
- animate
- antiword
- anXious
- anytopnm
- apack
- apagado
- apm
- apm_available
- apmsleep
- appindex
- appletproxy
- appletviewer
- appres
- appwatch
- apropos
- apt-cache
- apt-cdrom
- apt-config
- apt-extracttemplates
- apt-file
- ash
- ask
- asmounter
- aspell
- asWedit
- aterm
- aterm-xterm
- atktopbm
- atobm
- atool
- attr
- audacity
- audiocompose
- audiofile-config
- audiosend
- august
- aumix
- aunpack
- austlii
- auto-apt
- autoconf
- autoconf2.13
- autoconf2.50