ThinkPad 800 series The ThinkPad 800 series (800/820/821/822/823/850/851/860) were unique
in that they were based on the PowerPC architecture, rather than the Intel x86 architecture.
They all used the PowerPC 603e CPU, at speeds of 100 MHz, or 166 MHz in the 860 model. The
800 may have used a 603, and it is unclear if the 800 was experimental or not. All units used
SCSI 2 instead of IDE hard disks. The units are believed to have all been extremely expensive,
as the 850 cost upwards of $12,000. The 800 series can run Windows NT 3.5 (probably 4.0 as well),
OS/2, AIX 4.14, Solaris Desktop 2.5.1 PowerPC Edition, and Linux.