Metal Gear/Frequencies and secrets

Frequencies
Your transceiver can pick up a wide range of frequencies, but only a few of them are actually of use to you throughout the game. The following is a table of people you can contact, and what frequency they can be reached on. Note that once you reach building 2 and beyond in the game, your contacts will change their frequencies.

Cheat codes
The following are a set of codes that you can enter that allow you to cheat by advancing your rank, increasing capacity limits, or giving you items early on. To enter these codes, you must pause the game with the F1 key, type the codes on the keyboard exactly as indicated (spaces and all), and unpause the game with the F1 key.