The IBM WatchPad was a line of earlier smartwatch prototypes, produced in 2000-2002.

[1][2][3][4][5] In June 2000, IBM displayed a prototype for a wristwatch that ran Linux.

IBM began to collaborate with Citizen Watch Co. to create the "WatchPad".

The WatchPad 1.5 features a 320 × 240 QVGA monochrome touch sensitive display and runs Linux 2.4.

[10][11] Citizen was hoping to market the watch to students and businessmen, with a retail price of around $399.