The Macintosh Quadra 605 (also sold as the Macintosh LC 475 and Macintosh Performa 475) is a personal computer designed, manufactured, and sold by Apple Computer from October 1993 to July 1996. The model names reflect a decision made at Apple in 1993 to follow an emerging industry trend of naming product families for their target customers Quadra for business, LC for education, and Performa for home. Accordingly, the Performa 475 and 476 was sold in department stores and electronics stores such as Circuit City, whereas the Quadra was purchased through an authorized Apple reseller. When introduced, the Quadra 605 was the least expensive new computer in Apple's lineup. (The Performa 410, introduced at the same time, at the same price of about $1,000 USD, which included a monitor, was based on the much older Macintosh LC II with a 16 MHz 68030 processor.) The Quadra 605 reuses the Macintosh LC III's pizza box form factor with minor modifications. The Quadra 605 was discontinued in October 1994, and the LC 475 variant continued to be sold to schools until July 1996. Apple offered no direct replacement for these machines, making it the final Macintosh to use the LC's lightweight slim-line form factor. Apple would not release another desktop computer under until the Mac Mini, nearly ten years later. Models All models come standard with a Motorola 68LC040 CPU running at 25 MHz, 4 MB RAM on board, 512 KB of VRAM (expandable to 1 MB), 1 LC III-style Processor Direct Slot, 1 ADB and 2 serial ports, external SCSI port, and a manual-inject floppy drive. Introduced October 18, 1993: Macintosh Performa 475: 4 MB RAM, 160 MB HDD. Bundled with a keyboard and Apple Color Plus 14" Display. Macintosh Performa 476: 4 MB RAM, 230 MB HDD. Bundled with a keyboard and Apple Color Plus 14" Display. Introduced October 21, 1993: Macintosh Quadra 605: 4 MB RAM, 80 MB HDD. Slightly different case design, the only variant that does not have a case screw. Not available in Europe. Macintosh LC 475: 4 MB RAM, 80 MB HDD. Bundled with a keyboard and optionally with an Apple Macintosh Color Display; Education market only. Hardware Central processing unit: 25 MHz MC68LC040, 32-bit bus. 8 KB of on-chip L1 cache is divided into 4 KB of data and 4 KB of instruction cache. There are no other caches, although an L2 cache is