| ACL | ⊕ 1971 | ↓ ↑ ⊕ Multi-purpose | ⊕ Early Autocodes | ⊕ United Kingdom | Systems language for ICL Atlas |
| Basic Systems Language | ⊕ 1971 | ↓ ↑ ⊕ Multi-purpose | ⊕ United States | Forerunner of PL/S | |
| CLASP | ⊕ 1971 | ↓ ↑ ⊕ Multi-purpose | ⊕ United States | Computer Language for AeronauticS and Programming - SPL subset | |
| LSD | ⊕ 1971 | ↓ ↑ ⊕ Multi-purpose | ⊕ United States | Language for Systems Development | |
| NB | ⊕ 1971 | ↓ ↑ ⊕ Multi-purpose | ⊕ CPL Algols | ⊕ United States | Early version of C |
| PL-11 | ⊕ 1971 | ↓ ↑ ⊕ Multi-purpose | ⊕ PL-360s | ⊕ Switzerland | CERN PDP-11 systems language |
| SIMPLE | ⊕ 1971 | ↓ ↑ ⊕ Multi-purpose | ⊕ Other PL/Is | ⊕ United States | |
| SPL | ⊕ 1971 | ↓ ↑ ⊕ Multi-purpose | ⊕ Other PL/Is | ⊕ Canada | Systems Programming Language |
| SPL | ⊕ 1971 | ↓ ↑ ⊕ Multi-purpose | ⊕ Germany | Simple Programming Language | |
| Stanford Pascal | ⊕ 1971 | ↓ ↑ ⊕ Multi-purpose | ⊕ Pascals | ⊕ United States | Pascal at Stanford on CDC |