The Macintosh SE is a personal computer that was designed, manufactured and sold by Apple Computer, Inc. from March 1987 to October 1990. This computer marked a significant improvement on the Macintosh Plus design and was introduced by Apple at the same time as the Macintosh II.
It had a similar case to the original Macintosh computer, but with slight differences in color and styling. An enhanced model, the SE/30 was introduced in January 1989; sales of the original SE continued, with an update following in August of that year to include a SuperDrive. The Macintosh SE was replaced with the Macintosh Classic, a very similar model which retained the same central processing unit and form factor, but at a lower price point.
Processor: Motorola 68000, 8 MHz
System Bus Speed: 8 MHz
ROM Size: 256 kB
Data Path: 16-bit Level 1
RAM Type: 150 ns 30-pin SIMM
VRAM Type: Built-in
Standard RAM: 1 MB
Maximum RAM: 4 MB
RAM Slots: 4 (in pairs)
Standard Hard Drive: 20 MB
Int. Hard Drive Type: SCSI
Standard Disk: 3.5 in, 800 kB, 800 kB x 2 (auto)
Exp. Slots: SE PDS
Battery Type: 3.6 V lithium
Display: 512x342 9 inches (23 cm) monochrome
Video memory: 512x384x1
Supported Mac OS: 3.3–7.5.1, 7.5.3–7.5.5
Avg. Weight: 17.0 lb/7.7 kg
Source: Wikipedia, "Macintosh SE", available under the [creativecommons.org/licenses/by-sa/3.0/ CC-BY-SA License].