| AUTOTIMER | ⊕ 1957 | ↓ ↑ ⊕ Experimental and other | ⊕ Debugging languages | ⊕ United States | |
| Computer Operations Language | ⊕ 1957 | ↓ ↑ ⊕ Experimental and other | ⊕ Intermediate languages and VMs | ⊕ United States | Machine-independent language |
| Music | ⊕ 1957 | ↓ ↑ ⊕ Experimental and other | ⊕ Sound-Performance | ⊕ United States | Languages for musical sound synthesis |
| PRORAB | ⊕ 1957 | ↓ ↑ ⊕ Experimental and other | ⊕ Lenigrad languages | ⊕ Russian Federation | Leningrad Programming System |
| SPS-I | ⊕ 1957 | ↓ ↑ ⊕ Experimental and other | ⊕ Event scheduling | ⊕ United States | Simulations precursor to SIMSCRIPT |