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Computer engineering deals with the design of computers and computer systems. This may involve the design of new hardware. Computer engineers may also work on a system's software. However, the design of complex software systems is often the domain of software engineering, which is usually considered a separate discipline.[82] Desktop computers represent a tiny fraction of the devices a computer engineer might work on, as computer-like architectures are now found in a range of embedded devices including video game consoles and DVD players. Computer engineers are involved in many hardware and software aspects of computing.[83] Robots are one of the applications of computer engineering.

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How do these players collaborate on the technical level? To answer this question, we need to introduce and briefly explain some key abbreviations related to flight booking. If you want to become better acquainted with systems and concepts behind the three-letter short forms, just click on the link to the dedicated article.

A passenger name record (PNR) or booking file is a digital document that contains information about a traveler or group of travelers and their itinerary. Each PNR has a unique code called a booking reference or record locator. Thanks to this number, the file can be easily found in the CRS database. A traveler purchasing a flight gets the code via email and can use it to access flight details or check in online. 350c69d7ab