I'm sure it's very simple, but I can't remember how to tell a terminal pager (more/less/pg/most) to display a long list in columns.
Since my input is just a list of short elements, displaying it the same way
ls does it by default would save me needless scrolling and precious screen real estate.
aaa bbb ccc ddd eee fff ggg hhh iii
aaa ddd ggg bbb eee hhh ccc fff iii