IBM 1130
Models
IBM implemented five models of the 1131 Central Processing Unit, the primary processing component of the IBM 1130. The Model 1 through Model 5 described the core memory cycle time, as well as the model's ability to support disk storage.

IBM 1130

Section Title: Models
Table Section Text: IBM implemented five models of the 1131 Central Processing Unit, the primary processing component of the IBM 1130. The Model 1 through Model 5 described the core memory cycle time, as well as the model's ability to support disk storage.

Memory cycle time

Core memory	3.6 µs, no internal disk	3.6 µs, plus disks	2.2 µs, plus disks	5.6 µs (3.6 µs: see below), single disk	2.2 µs, no internal disk

4096 words	Model 1A	Model 2A	--	Model 4A	--

8192 words	Model 1B	Model 2B	Model 3B	Model 4B	Model 5B

16,384 words	Model 1C	Model 2C	Model 3C	--	Model 5C

32,768 words	Model 1D	Model 2D	Model 3D	--	Model 5D

Sentence(s)

The IBM 1130 has 32,768 16 words of memory.

final_sentence: The IBM 1130 has 32,768 16 words of memory.