I believe it was in Oath of Fealty by Pournelle and Niven that some of the characters had brain implant interfaces that allowed them to access the main computer for information by just thinking the right codes, then thinking google-type combinations of words. Two people with implants could sit at a conference table with a whole bunch of other people and carry on a conversation without the others knowing.

Handy. Computer Aided Telepathy.

That would be pretty neat at a song-fest or a gig. Access DT for a song you want to sing, and you'll never blank out on the words.

Don Firth