TASK DEFINITION: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
PROBLEM: A Computer crash is when a computer program stops running normally .

SOLUTION: In computing , a crash , or system crash , occurs when a computer program such as a software application or an operating system stops functioning properly and exits .

PROBLEM: An IATA airport code , is a three-letter code that can be used to identify airports .

SOLUTION: An IATA airport code , also known as an IATA location identifier , IATA station code or simply a location identifier , is a three-letter code designating many airports and metropolitan areas around the world , defined by the International Air Transport Association ( IATA ) .

PROBLEM: The Walker Papers is an Air Force Fellows program .

SOLUTION:
The Walker Papers is an Air Force Fellows program that annually honors the top three research papers produced by Air Force Fellows with the Walker Series award .