| ↔ Order by name | ↔ Order by year | ↔ Order by year reverse | ↔ Order by Type | ↔ Order by Sammet category |
| BRLESC Instruction Code | ⊕ 1960 | ⊕ Initial orders | ⊕ United States | Initial orders for the BRLESC computer | |
| C-10 | ⊕ 1949 | ↓ ↑ ⊕ Multi-purpose | ⊕ Initial orders | ⊕ United States | First Mnemonic codeset |
| CYCLONE Initial orders | ⊕ 1955 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Initial orders | ⊕ United States | CYCLONE's initial orders |
| DOI | ⊕ 1952 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Initial orders | ⊕ United States | Wheeler |
| ENIAC short code | ⊕ 1946 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Initial orders | ⊕ United States | Clippinger/von Neumann short code |
| ORACLE Order Code | ⊕ 1957 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Initial orders | ⊕ United States | Oak Ridge initial orders |
| Seeber instructions | ⊕ 1949 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Initial orders | ⊕ United States | First soft-addressable memory |
| Shannon hardware logic | ⊕ 1948 | ⊕ Initial orders | ⊕ United States | Wiring logic system | |
| WEIZAC Initial orders | ⊕ 1954 | ↓ ↑ ⊕ Excluded from Sammet | ⊕ Initial orders | ⊕ United States | IO for the WEIZAC |