Tsvetan Usunov graduated in 1991 at the Technical University of Plovdiv and established OLIMEX Ltd in the same year. The company now has over 20 years’ experience in designing, prototyping and manufacturing printed circuit boards, sub-assemblies, and complete electronic products. It became   the leading provider for development tools for programmers of embedded systems. Tsvetan is an Open Source Hardware and Free Open Source Software enthusiast. About one half of the 600+ products designed by OLIMEX Ltd have Open Source Hardware licenses, which means that everyone has access to the design files and may study, modify, distribute, make, and sell the design or hardware based on that design.