| BLISS | 1969 | Multi-purpose | Wirth Algols | United States | CMU systems programming language |
| CS-4 | 1975 | Multi-purpose | Wirth Algols | United States | Intermetrics System Lanugage |
| DOD specification | 1975 | Wirth Algols | United States | ||
| ESP | 1970 | Wirth Algols | United States | Extra Simple Pascal | |
| LIS | 1973 | Wirth Algols | France | Langage Implementation Systeme - protoAda | |
| PL/0 | 1975 | Wirth Algols | Switzerland | Model language of Wirth | |
| Strawman | 1975 | Wirth Algols | United States | ||
| Woodenman | 1975 | Wirth Algols | United States |