comp.emulators.apple2 - join
Emulators of Apple // systems.
Low activity, 142 subscribers, Usenet

comp.sys.cbm - join
Discussion about Commodore micros.
Low activity, 618 subscribers, Usenet

comp.os.cpm - join
Discussion about the CP/M operating system.
Low activity, 239 subscribers, Usenet

comp.sys.atari.8bit - join
Discussion about 8 bit Atari micros.
Low activity, 263 subscribers, Usenet

comp.sys.tandy - join
Discussion about Tandy computers: new & old.
Low activity, 188 subscribers, Usenet

Vintage Macs - join
Low End Mac's group for those using vintage (pre-PowerPC) Macintosh computers. This included models built to use the Motorola 68000, 68020, 68030, and 68040 CPU, as well as 680x0 models with PowerPC upgrades. It does not include Power Macs or any other Macs built to use PowerPC CPUs.
Low activity, 1348 members, restricted

comp.sys.apple2.programmer - join
Programming on the Apple II.
Low activity, 144 subscribers, Usenet

comp.sys.apple2.marketplace - join
Buying, selling and trading Apple II equipment.
Low activity, 195 subscribers, Usenet

comp.sys.apple2.comm - join
Apple II data communications.
Low activity, 30 subscribers, Usenet

comp.sys.apple2.gno - join
The AppleIIgs GNO multitasking environment.
Low activity, 20 subscribers, Usenet