Editing USAS (application)

{{short description|Series of mainframe applications}}
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'''USAS''' is [[software suite]] for [[mainframe computers]], mainly intended for use in the [[airline]], transportation, and [[hospitality]] industries. It is made up of a series of diverse and relatively complex [[application software|applications]] written for the [[Unisys]] 1100-series, 2200-series, and Clearpath IX environments. 

[[All Nippon Airways]] became the first company to adopt the system in the late 1970s.<ref name=aircore2006>{{cite web |title=AirCore NEWS |url=https://www.app5.unisys.com/library/gmmail/emails/documents/GCTransAirCoreJuly2006.pdf |publisher=[[UNISYS]] |access-date=30 July 2024 |date=July 2006}}</ref> Its name was originally an acronym for '''Univac Standard Airline Systems''', but the product line is now referred to simply as "USAS". With advancements in computing, USAS is slowly being replaced in the airline industry with other software, with Unisys also developing AirCore to replace its USAS offering.<ref name=aircore2006/>

==Applications in the suite==
USAS was mainly developed for use by airlines. Check-in, [[Airline reservations system|reservations]], and cargo operations are therefore among its main components. The original USAS applications such as USAS*RES (Reservation System), USAS*CGO (Cargo Application) were written in the early 70s and have been adapted in different forms in varying degrees of customization.

Most (if not all) USAS applications are written as text-based online transaction systems which are designed for low overhead and fast response times.  The environment most commonly used is HVTIP (Unisys' High-Volume Transaction Processing).

==Development==
Older USAS applications such as USAS*RES (Reservations System) or USAS*FDC (Flight Data Control) were written originally in [[Fortran]], but elements of various applications were also written in [[COBOL]], Unisys 1100/2200 [[assembly language]] (ASM or [[MASM]]), and the [[LINC 4GL]]. Lufthansa plays a major role in developing the USAS suite.

==Current Users==
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*Unisys Cargo Hosting Services, Minneapolis :: Delta Cargo, Air Canada Cargo
*Air Iberia
*Travel Sky, China
*Amadeus
*NorthWest (cargo)
*Cathay Pacific
*Qantas Airways
*Air India

==See also==
*[[List of UNIVAC products]]

==References==
{{reflist}}

[[Category:Business software]]
[[Category:Fortran software]]
[[Category:UNIVAC software]]