Whiteboard
Whiteboards became commercially available in the early 1960s, but did not become widely used until 30 years later. Early whiteboards needed to be wiped with a damp cloth and markers had a tendency to leave marks behind, even after erasing the board. Dry-erase markers for whiteboards were invented in 1975.
Apple Keyboard
The release of the first iMac in October 1998 introduced a matching compact, translucent-plastic keyboard based on laptop technology and marked the transition from ADB to USB. In July 2000, it was replaced with the full-sized Pro Keyboard, having slightly translucent black keys and a clear case. The PowerBook and iBook integrated keyboards followed suit with translucent keys first in bronze (PowerBook), then in black (PowerBook) and white (iBook). Coinciding with the introduction of the iMac G4 in 2002, Apple started making its keyboards white. On the Bluetooth Wireless Keyboard, Apple removed the adjustable feet from the back of the keyboard, giving it a solid base. This design was later quietly introduced on the wired version. The Aluminum PowerBooks added another color, opaque aluminum with sometimes-backlit translucent legends, to the array of keyboard styles in use.