Well, from Arthur C. Clarke’s future in 2001: A Space Odyssey – an astronaut reads the news [HT: Liz Donovan]:

…he would hold the front page while he quickly searched the headlines and noted the items that interested him.

…One by one he would conjure up the world’s major electronic papers; he knew the codes of the more important ones by heart, and had no need to consult the list on the back of his pad.

…Each (headline) had its own two-digit reference; when he punched that, the postage-stamp-sized rectangle would expand until it neatly filled the screen and he could read it with comfort.