The SK-8840, SK-8845 and SK-8845RC were the most common members of the LITE-ON produced SK-8835/SK-884x ThinkPad-style keyboard family. The SK-8840 and SK-8845 were both introduced in 2004 as the PS/2 and USB version (respectively) of the same design. The SK-8845RC was released by 2010 and was a variant of the SK-8845 with a longer USB cable. All three made use of the Synaptics TouchStyk pointing stick and Synaptics TouchPad trackpad. Market names include IBM PS/2 Travel Keyboard with UltraNav (SK-8840), IBM USB Travel Keyboard with UltraNav, IBM USB Travel Keyboard Option (SK-8845), IBM UltraNav USB Keyboard or IBM Keyboard with Integrated Pointing Device USB (SK-8845RC).