The first revolutionary Football Manager was created by Addictive Games in 1982 for the ZX Spectrum and then ported to many other platforms. Kevin Toms created the first version of the game on a clone of the TRS-80.
Santa Paravia and Fiumaccio is an early managerial simulation created initially by George Blank for the TSR-80 in 1978. The source code of the game (written in BASIC) was published in SoftSide magazine.
Super Star Trek is an old text-only game, an early example of a turn-based space strategy sim/wargame created by Robert Leedom e David Ahl. The game code was published in the 1978 book BASIC Computer Games - Microcomputer Edition.