If you find the various models of AT&T’s 3B Unix supermicros confusing, you’re in good company: Electronic News reports that resellers have now latched on to the fact that despite its lowly nomenclature the 3B2/600 has an 18MHz chip against 14MHz in the 3B15 and 10MHz in the 3B5, supports 64 users against 60 on each of the other two, and is rated at between 2.6 MIPS and 4 MIPS against 1.4 MIPS and 0.8 MIPS respectively for the other two, not to mention the fact that unlike the others it sports an SCSI interface, all of which has those resellers who originally opted for the other two systems confused and none-too-happy with AT&T.