G5, G.V, G.5 or G-5 may refer to:
The G5 is a grouping of five English public research universities that was established in early 2004. The members are Imperial College London, the London School of Economics, the University of Cambridge, the University of Oxford and University College London. The members of the G5 initially formed the grouping in order to co-ordinate bidding for an increased share of any extra monies made available in the government's summer spending review. The objective was to secure extra state funding above the £3,000 student top-up fees planned in England from 2006 to cover the full costs of home and European Union undergraduates on their courses. This has been attributed to the universities stating they are offering no cheap courses, and that they would have to reduce their intake of UK students without the additional income. The grouping called itself the G5 and its existence was first reported by the Times Higher Education in February 2004.
The Power Mac G5 is Apple Inc.'s marketing name for models of the Power Macintosh that contained the IBM PowerPC G5 CPU inside an anodized aluminium chassis. The professional-grade computer was the most powerful in Apple's lineup when it was introduced, widely hailed as the first 64-bit personal computer, and was touted by Apple as the fastest personal computer ever built. It was officially launched as part of Steve Jobs' keynote presentation in June 2003 at the Worldwide Developers Conference, and saw three revisions to the line before being retired in August 2006 to make way for its Intel replacement, the Mac Pro.
The Power Mac G5 was introduced with three models, sharing the same physical case, but differing in features and performance. The physical case of the Power Mac G5 was very different and unusual compared to any other computer at that time. Although somewhat larger than the G4 tower it replaced, the G5 tower had room inside for only one optical, and two hard drives.