Esten Complex

Esten Complex is a series of operating systems built and developed by Esten, being based on Linux kernel. It was launched in 1989 as E-System.

2013-2023 (Esten ComplexOS 8, based on Android 4.4/5.0/6.0)
This version was integrated with its mobile phone operating system Esfos to make a unified operating system.

2022-present
The new logo was revealed on Esten Developer Conference Spring 2022, but not used until the release of Complex 11.