The Power Macintosh 5500 is a personal computer designed, manufactured, and sold by Apple Computer from February 1997 to March 1998. Like the Power Macintosh 5260 and 5400 that preceded it, the 5500 is an all-in-one design, built around a PowerPC 603ev processor operating at 225, 250 or 275 megahertz (MHz). Apple originally produced the Power Macintosh 5500 for the educational market as a replacement for the previous year's Power Macintosh 5400. It is the last All-In-One from Apple to be housed in the Power Macintosh 5200 LC's form-factor; its replacement, the Power Macintosh G3 All-In-One, introduced a significantly different design. Hardware The 225 and 250 MHz models were produced in beige and black, whilst the rarer 275 MHz models were only black. External ports: External ports include two LocalTalk/GeoPort serial ports, a DB-25 SCSI port, an ADB port, a stereo sound input port, a built-in microphone above the monitor, stereophonic sound output ports, a headphone jack on the front, a stereo miniphone jack on the back. Memory: Unlike the 5400, the 5500 has no soldered on-board memory. There are two JEDEC-standard DIMM slots (168- pin, 60 ns or faster, 2K refresh rate, 5-volt buffered EDO DIMMs), which can support up to 64 MB each, for a total maximum memory of 128 MB, 8 less than the 5400. Cache: The processor makes use of 32 kilobytes (KB) of L1 cache, with an option for a 256 or 512 KB L2 cache (the latter being available only on the 275 MHz model) cache operating at the stock 50 MHz bus speed. Hard disk: The 5500 includes a larger ATA hard disk than its predecessor. The computer came stock with a 2 gigabyte (GB) hard disk, but the 275 MHz model came with a 4 GB drive; a faster SCSI CD-ROM drive (12x in early models and 24x in the top-end). Video: An accelerated ATI 3D Rage II+ DVD graphics card, containing 2 megabytes (MB) of dedicated SGRAM and allowing for resolutions up to 832x624 at 32 bits per pixel, 1152x870 at 16 bpp, and 1280x1024 at 8 bpp. An optional video connector kit is available which adds a DB-15 output port to the back; the output of this display mirrors the main screen, suitable for presentations. Floppy disk: The 5500 includes Apple's standard SuperDrive 1.44 MB floppy drive. CD-ROM: All 5500 configurations include either a 12x or 24x CD-ROM. Multimedia: 5500s