Master Chief is back, and as you’d expect, he’s a little busy killing aliens and saving mankind - usually while cartwheeling a Warthog through the air. So sometimes the search for data terminals takes a backseat. Thankfully, if you know exactly where to look, you can save a lot of time and better enjoy your fourth stint as the famous Spartan savior.
There are seven terminals in Halo 4 - one for each mission, not counting the prologue or Mission 1. If you’ve already completed a mission and only need to go back for the terminal, you can load the rally point listed instead of restarting from the beginning.
Be sure to check our Halo 4 multiplayer guide also.