LOOK

LOOK, well, looks at something and sees what you can see. You can also look in many types of items like light sources to tell how much fuel they have, look in guns to see how many shots they currently have loaded, look in vehicles to see how much fuel they have.

For short you can just type 'L' and that will work as well.

LOOK <direction> will often give you clues if you're about to walk into danger or help you get your bearings. Not all exits have look at descriptions but the important ones should.

EXAMINE is short for 'LOOK container' followed by 'LOOK IN container'.