Longman Dictionary of Contemporary English
Wiktionary
n. A multifunction device, especially a printer that also works as a scanner and fax machine.
Wikipedia
All-in-One (AIO), also known as #-in-1, CD-ROMs or DVD-ROMs contain more than one application on the disc. Typically, this would simply be different editions of the same version. AIOs are normally created by warez groups in order to save time to download and upload software, while giving a large collection of editions at the same time. However, software companies may release AIOs themselves to high-paying customers.
Usage examples of "all-in-one".
Fleet Command, operating from a center several floors below his office in Pentagon II, was working on eventual scenarios the Primes would use to attack the planets, massed waves or an all-in-one blitz.
The toilets were molded, all-in-one, stainless steel units, with just a handle sticking out of the wall, so nothing could be vandalized.
Dissemination-Grids, screens so hígh-def you might as well be there, cost-effective videophonic conferencing, internal Froxx CD-ROM, electronic couture, all-in-one consoles, Yushityu ceramic nanoprocessors, laser chromatography, Virtual-capable media-cards, fiber-optic pulse, digital encoding, killer apps.