ThinkPad

Models

300 series (replaced by A series): CPUs from 386SL/25 to Pentium III 450; larger, heavier, slower, and cheaper (Parts: Impact)
- 390X: Mobile Pentium II / 400, 6.4GB, 15" 1024x768 active matrix TFT
500 series (replaced by X series): CPUs from 486SX2-50 Blue Lightning to Pentium III 500: main line; lightweight, slim, only HD onboard
600 series (replaced by T series): Pentium MMX, II, and III; very durable
700 series (replaced by A & T series): cutting-edge models – largest screens, largest HDs, fastest CPUs (for the time)
- 700: monochrome screen
- 700C: active matrix TFT color screen
- 701 models have the "butterfly" fold-out keyboard
800 series: PowerPC 603e CPU at 100 MHz (except where noted); SCSI2 instead of IDE
- 860: CPU at 160 MHz
A series
- Hardware Maintenance Manual
- A31p: as of 2006 (presumably), seven of these are being used in orbit aboard the International Space Station
R series
- R30: manufactured by Lenovo
- R31: manufactured by Lenovo
- R32: ThinkWiki
- R40e: manufactured by Lenovo
T series
- T20 series (T20, T21, T22, T23): Pentium III Mobile, 650 MHz to 1+ GHz
  - T23: internal WiFi
- T30 series (one model only): Intel Mobile Pentium 4 from 1.6 GHz to 2.4 GHz
- T40 series (T40, T41, T42, T43): Intel Pentium M Processor 1.3 GHz to Pentium M 770 at 2.13 GHz
- T60 series
X series
- X20 series
- X30 series
- X40 series: very well-supported by OpenBSD
  - X41 tablet model
- X60 series
Z series (introduced by Lenovo)
- Z60 (Z60, Z61)

"ThinkPad", no model number: tablet computer without keyboard, using Go PenPoint OS
models 700 / 700C : first ThinkPads introduced