The Performa 580 and 588 were released in April of 1995, and has yet to be discontinued. They're exactly the same as the LC 580, except for several home-based enhancements. They're also pretty similar to the rest of the computers in the 5xx series except for a few different configurations. The Performa 580 came with System 7.5 preinstalled and also came with the standard software and modem. The memory was doubled from the similar LC 580 to 8MB (expandable to 52MB), and the SCSI hard disk drive was replaced with the cheaper IDE drive, holding 500MB. The 580 also included TV input/output jacks that could operate in "mirror mode" like PowerBooks do for presentations. Besides that, it came with the same processor as the Performa 575, a 68LC040 running at 33 MHz, the same built-in 14" Trinitron display, and the same single PDS slot and comm slot, for graphics acceleration or DOS compatiblity, etc. But overall, Apple designed it with a multimedia slant the multimedia slant that made preceding models very popular among schools and home users. The 580 and its counterparts are a great machine for educational as well as home use.

Specifications:
Processor: Motorola 68LC040 running at 33 MHz.
Memory: came with 8MB of RAM expandable to an 8MB.
Drives: included an built-in Apple SuperDrive 1.4MB floppy drive, a CD-ROM drive, and an internal 500MB IDE hard drive.
Expansion: 1 PDS slot, 1 Comm slot.
Ports: included two ADB ports, two mini-circular 8 serial (RS-422) ports, and one DB-25 SCSI port. ADB Keyboard and mouse included.
Display: Had a built-in 14" Mac Color Display, supporting only 640x480.

Operating Systems:
Mac OS: comes with System 7.5 preinstalled, supports System 7.5-7.51, 7.53-8.1.
ProDOS: all versions via IIe PDS card or emulation.
GS/OS: all versions via IIe PDS card or emulation.

On the market for: 2 years (not yet discontinued)

Resources and Related Links:
Apple's Technical Information Library
David Pogue's and Joseph Schorr's Macworld Mac SECRETS.
Picture above from A History of Apple Computer.