All 4 Uses of

queue
in
The 100, by Morgan

But he couldn't spend two hours surrounded by the same tutorial mates who had filled his message queue with vague, uncomfortable condolences.†
p. 13.1 *

Glass pulled up her message queue to reread the note he'd sent her that morning.†
p. 237.2

But even if you don't (or can't) write back, I'm going to keep filling your queue with my stupid ramblings because, no matter what happened, you're still my best friend and I'll never stop wishing you were here.†
p. 237.4

Definitions:

(1) (queue as in: in the queue)
a line of people waiting for something; or anything (such as computer tasks) that are lined up to be handled in order

Queue, in the sense of a line of people is more often used in Great Britain than in the United States.
(2) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

Much more rarely, queue can refer to a pigtail (a braid of hair worn hanging at the back) as in "At that time in history, the Manchus forced the Han Chinese to adopt the Manchu queue hairstyle."