Bath, Avon software house Praxis Systems Ltd has won agreement for ECAD Inc, Santa Clara, California to market its Ella hardware description language for the expression, verification and management of very large scale integrated circuit designs. ECAD will have exclusive US distribution rights for two years and may also distribute Ella worldwide outside the UK. Ella complements ECAD’s existing Dracula, Symbad and Simon chip design software by enabling engineers to start at the highest level of design, saving time and enab ling management of more complex de signs. Praxis claims that Ella is used by the majority of major UK electronics companies. Ella, out on DEC VAXen under VMS and Ultrix, and on Sun and Apollo stations, in tegrates into the Ella database system a language to express the design, a high performance simulat or to verify it and a set of open interfaces so that design data can be exported to other CAE tools. ECAD will initially offer Ella in the US at prices from $40,000 to run on a single-user workstation.