It can store up to 10 entries single line each for later retrieval using the hotkeys ctrl+ 1-9.
For instance, if your teammate uses a primary weapon, then your primary weapon is the one that will gain experience.
The other is, some people will claim they have the relic, you go into mission and as soon as someone gets the drop, they take it and leave squad, that is they don't really had the relic, just leeched off everyone.
Part of the reason why is due to Warframe's steep learning curve.
You may find missions easier to complete by eliminating enemies stealthily before they can raise the alarm.
By the time I got to the part where I was stuck, the alert timer ran out, so I couldn't just leave and retry.