3 browser Browser / Editor / Pager
4 editor Browser / Editor / Pager
5 pager Browser / Editor / Pager
6 chat IRC / ICQ / JABBER
8 archive Compression and Archivers
11 debug Debugging / Analyzing
12 devel Development / Headers
15 firewall Firewall / Routing / Bridging
16 kernel External Kernel Modules
17 route Firewall / Routing / Bridging
18 bridge Firewall / Routing / Bridging
19 fs Filesystem / Blockdevice utilities
20 ha Linux High Availability
22 lang Programming / Languages
28 net/fs Network Filesystems
29 net/misc Networking Misc
30 net/security Network Security
34 ppp PPP / PPTP / RADIUS
37 serial Serial communications & terminal emulation
39 admin System Administration
43 x11/apps X applications