4ASystems, Equipment and Components

4A Systems, Equipment and Components

4A001 Electronic computers and related equipment, having any of the following and “electronic assemblies” and specially designed components therefor:

N.B.: SEE ALSO 4A101.

a. Specially designed to have any of the following:

1. Rated for operation at an ambient temperature below 228 K (‑45°C) or above 358 K (85°C); or

Note: 4A001.a.1. does not apply to computers specially designed for civil automobile, railway train or “civil aircraft” applications.

2. Radiation hardened to exceed any of the following specifications:

a. Total Dose 5 x 103 Gy (Si);

b. Dose Rate Upset 5 x 106 Gy (Si)/s; or

c. Single Event Upset 1 x 10‑8 Error/bit/day;

Note: 4A001.a.2. does not apply to computers specially designed for “civil aircraft” applications.

b. Not used.

4A002 Not used.

4A003 “Digital computers”, “electronic assemblies”, and related equipment therefor, as follows and specially designed components therefor:

Note 1: 4A003. includes the following:

a. ‘Vector processors’;

b. Array processors;

c. Digital signal processors;

d. Logic processors;

e. Equipment designed for “image enhancement”.

Note 2: The control status of the “digital computers” and related equipment described in 4A003. is determined by the control status of other equipment or systems provided:

a. The “digital computers” or related equipment are essential for the operation of the other equipment or systems;

b. The “digital computers” or related equipment are not a “principal element” of the other equipment or systems; and

N.B. 1: The control status of “signal processing” or “image enhancement” equipment specially designed for other equipment with functions limited to those required for the other equipment is determined by the control status of the other equipment even if it exceeds the “principal element” criterion.

N.B. 2: For the control status of “digital computers” or related equipment for telecommunications equipment, see Category 5, Part 1 (Telecommunications).

c. The “technology” for the “digital computers” and related equipment is determined by 4E.

a. Not used.

b. “Digital computers” having an “Adjusted Peak Performance” (“APP”) exceeding 29 Weighted TeraFLOPS (WT);

c. “Electronic assemblies” specially designed or modified for enhancing performance by aggregation of processors so that the “APP” of the aggregation exceeds the limit specified by 4A003.b.;