EKA1 (EPOC Kernel Architecture 1) is the first-generation kernel for Symbian OS. It offers pre-emptive multitasking and memory protection, but no real-time guarantees and a single-threaded device driver model. It has now largely been superseded by EKA2.Much of EKA1 was developed by a single software engineer, Colly Myers, when he was working for Psion Software in the early 1990s. Myers went on to act as CEO for Symbian Ltd.