The following is a list of various series of Thinkpad computers.
- Thinkpad A: All in One Notebooks, heavy, large, three spindle machines, all drives internal, two swappable drive bays. This line has been discontinued.
- Thinkpad R: Traditionally the budget laptop line, there are now 'mobile workstation' configurations to replace the now-discontinued A-series.
- Thinkpad G: Desktop replacement machines built on desktop processors, large and heavy with limited battery runtime.
- Thinkpad T: Slimline Notebook, two drives internal, light and thin with one swappable bay.
- Thinkpad X: Subnotebook, very small and light, hard drive internal, no internal optical drive, small screen.
- Thinkpad I: Budget consumer series notebooks manufactured by Acer under license from IBM. (No longer manufactured)
- Only numbers: Classic models. (No longer manufactured)
This category has the following 26 subcategories, out of 26 total.