1960s languages ↑

Early Cold War ↑

Third generation ↑

ALGOL X | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ Germany | Algol 60 revision proposal |

Basic FORTRAN | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ FORTRAN IV standard | ⊕ United States | |

Constraint Algol | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ United States | Algol 60 with constraints |

Extended ALGOL | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ United States | |

IFIP ALGOL | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ International | |

Klerer-May System | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Algebraic | ||

MATHLAB | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Arithmetic | ⊕ United States | Interactive maths language |

Proposal Writing Language | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Plan languages | ⊕ United States | |

Schoonschip | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Algebraic | ⊕ Switzerland | Symbolic maths |

STL Online Computer System | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Algebraic | ⊕ United States | Improved version of Tanoga Park CFS |

VALGOL II | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ United States | |

VPRPAK | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ Arithmetic | ⊕ United States | A set of subroutines to do variable precision and rational arithmetic |

Whetstone Algol | ⊕ 1964 | ↓ ↑ ⊕ Numerical Scientific | ⊕ True ALGOL60s | ⊕ United Kingdom |