Acronym for Programmed Inquiry, Learning or Teaching. A programming language developed in 1976 by John A. Starkweather and designed primarily for creating applications for computer-aided instruction.

Serving as a guiding or tracing device, an activating or auxiliary unit, or a trial apparatus or operation

ETYM French pilote, prob. from Dutch peillood plummet, sounding lead.
1. A person qualified to guide ships through difficult waters going into or out of a harbor.
2. Someone who is licensed to operate an aircraft in flight.

A series of popular handheld personal digital assistants (PDAs) designed by Palm and based on the Palm OS operating system. Palm introduced its first Pilot model in 1996, followed in 1997 by the PalmPilot, and thereafter by a series of other Palm handheld models.

1. To direct the course of a ship or airplane.
2. (Figuratively) To guide, as through dangers or difficulties.