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Tech-Specs > Minimum OS Class Required > EPOC Release 5

EPOC Release 5 premiered in March 1999. It ran on ARMv4 processors, such as the StrongARM series. In addition to its email, messaging, and data synchronisation features, it introduced support for the Java Development Kit, which made it capable of running a wider variety of programmes. In 2000, EPOC's GUI variations were replaced with three reference interfaces: Crystal was for devices with a small keyboard; Quartz was for "communicator" devices (which had some telecommunication features, and tended to be equipped with a thumb keyboard); and Pearl was for mobile phones. Each classification supported VGA graphics. Psion deployed Release 5 on their 5mx series (1999), Revo (1999), netBook (1999), Series 7 (1999), Revo Plus (2000), and netPad (2001) devices.[10] Ericsson rebranded the Psion Series 5mx as the MC218, and SONICblue rebranded the Revo as the Diamond Mako; like the original devices, the rebranded versions were released in 1999.