Marine Corps · SSN history

613 Computer

Appendix B identifies SSN 613 as “Computer” under AR 615-26 of September 1942 and its supplements, and suggests SSNs 227 or 645 as possible conversions. These were not automatic replacements: each affected Marine’s qualifications had to be reviewed against the job requirements before selecting a specialty.

Codes named in this history

Other history records

These source identifiers have archive pages. Their availability does not establish current service use or retirement.

Codes without a directory match

  • 227 stated by the source. No directory or archive record matches.

Documented history

Computer

June 1945 is the manual’s publication date. No effective date is given for a change to SSN 613.

  • No June 1945 title is listed for SSN 613, and the entry does not establish a fixed split into both suggested specialties.
Source extraction notes

Predecessor title from the AR 615-26 column: Computer. Suggested conversions/remarks: 227, 645. The table gives no row-level effective date. June 1945 is the manual publication date, not an effective conversion date.

Source documents (1)

Reviewed September 24, 2026 against references 3 and 4.

Historical information is drawn from the sources linked above. Classification dates are not personal service dates. Spot an error? Let us know.