Electronic computers and related systems, equipment and components, or ‘electronic assemblies’ having any of the following: (a) Specially designed to have any of the following: 1. Radiation hardened to exceed any of the following specifications: a. Total dose 5 × 10 3 Gy (Si); b. Dose rate upset 5 × 10 6 Gy (Si)/s; or c. Single event upset 1 × 10 – 8 error/bit/day.

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 control 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 × 10 3 Gy (silicon); b. Dose Rate Upset 5 × 10 6 Gy (silicon)/s; or c. Single Event Upset 1 × 10 –8 Error/bit/day; Note: 4A001.a.2. does not control computers specially designed for “civil aircraft” applications. b. Not used.

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