Latest version of AIX

[Aaron C. Young]

	Hi,

	I manage four RT PC's and have my RT's running AIX 2.2.1.

	Is this the latest version?  where can I get the cheapest
	upgrades?

	Also has anyone ever gotten a window manager to work on the
	RT's?  TWM wouldn't work for me.

	Thanks,

	acyoung at sunrise.acs.syr.edu