DEC part number
From Computer History Wiki
DEC part numbers are generally of the form 'ww-xxxxx-yy zzzz' (sometimes the first hyphen is omitted). DEC had a system for their part numbers, such that looking at a part number will generally tell you (based on the leading two-digit field, the 'class code') what kind of part it is: chip, cable, etc. The next field is a 'basic identifier', then comes a 'variation identifier'; the final, optional, field is the 'revision identifier'. .
This table lists the major class codes:
Class | Type |
---|---|
10 | Capacitors |
11 | Diodes |
12 | 'DEC purchased vendor items' (connectors, pins, bearings, belts, fans, etc) |
13 | Resistors |
15 | Transistors |
16 | Transformers and inductors |
17 | Fiber-optic components |
18 | Crystals and other oscillators |
19 | Bipolar integrated circuits |
21 | MOS chips (CPUs, etc |
23 | Fixed memory chips (ROMs, etc) |
30 | Core memory stacks, major components |
36 | Paper tape, punched cards, labels |
50 | Printed circuit boards |
52 | Pulse transformers |
54 | Assemblies (circuit cards, display panels, etc) |
70 | Cables/harnesses |
74 | 'Manufactured non-electrical parts' (includes decals, etc) |
90 | Fastener hardware (nuts, bolts, screws, washers, ties etc) |
91 | Hook up wire and tubing |