[n] usenet News			(pbbs usenet)
[m] e-Mail	 		(pbbs mail)
[f] net File archives		(pbbs file)
[c] real-time Communications	(pbbs chat)
[a] Arcade			(pbbs arcade)
[i] Information			(pbbs info)
[u] Utilities			(pbbs util)
[s] misc. net Services		(pbbs misc)