Number Nine Apple Booster – Number Nine Computer Corporation (Number Nine Visual Technologies) Platform: Apple II, Apple II Plus Form Factor: 50-pin slot card Speed: 3.58 MHz Cache: 64 KB on board RAM DMA compatible: No Upgradeable: No Number Nine Apple Booster (1982) was one of the first accelerators for the Apple II series of computers. This card is the original version of Saturn's Accelerator II (thus the Accelerator II PCB shares both Saturn Systems' and NNCC's logos.) At $598, the Saturn was much cheaper than the NNCC, but little information about the board is available today.