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Symbian Ltd.
Written inAssembly language, C
OS familyEPOC (Symbian)
Working stateDiscontinued
Source modelProprietary
Initial release1989; 34 years ago (1989)
Marketing targetPDAs, mobile phones
Available inEnglish
Platformsx86, ARM
Kernel typeMicrokernel
Succeeded byEKA2
Official websitedeveloper.symbian.org/wiki/index.php/Category:Kernel_&_Hardware_Services

EKA1 (EPOC Kernel Architecture 1) is the first-generation kernel for the operating system Symbian OS. EKA1 originated in the earlier operating system EPOC. It offers preemptive computer multitasking and memory protection, but no real-time computing guarantees, and a single-threaded device driver model. It was largely been superseded by EKA2.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., when it was formed to license this kernel and associated operating system to mobile phone makers. He is now CEO of Issuebits Ltd.

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