RAIR Black Box Microcomputers were first introduced by RAIR Ltd during September 1978.

RAIR Black Box machines were sold as the ICL PC 1 (and later manufactured) by ICL.

The ICL PC 1 was re-sprayed and modified for reliability by ICL,

as the disk system of these machines were not to ICL's standards.

The four RAIR Black Box machines here in the Museum are:

1. A Model 3 type 20.

2. A Model 3 type 65 S.

3. A Model 3 type 50 S-C.

4. A Model 3 type 65 S (shown).

Notes:

(1) The type 20 machine here has been used by ICL as "Developmental Proprietary Equipment" in the development of the PC1 and has 4 outputs for serial terminals.

This has ICL labels and reference infomation from Bracknell but no RAIR or ICL badges. This would have been using the MP/M software, it has 64 Kb of RAM.

(2) The type 50 S-C and the type 65 S machines here have been upgraded with dual 8bit and 16bit CPU's, 1024 Kb of RAM and 16 outputs for serial terminals.

These came from a textile company in the midlands and were using the MP/M-86 software.

Black Box machines were the start of the ICL PC series, as the design was licensed by ICL.

This allowed ICL to modify and re-design the machines to their requirements.

All of the different types of re-designed machines are here at the Museum.

There are many complete machines of this PC series here, totalling some 32 to date.

These are photographs taken during the 1970's of the RAIR Ltd London, personnel.