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ALES was established in Czechoslovakia in 1992 by former Air Force radar professionals involved in research programmes focused on radar data processing systems beginning in the mid-1980s. Benefiting from their previous activities and experience in the ATC upgrade/integration programmes of the Czech and Slovak MoD while building on the solid tradition of Czechoslovak industry and radar production in particular, the company quickly established itself as the first supplier of advanced computer-aided ATC systems in the newly emerging Central/Eastern European region.
Following the break-up of Czechoslovakiain 1993, ALES continued doing business in both successor countries, the Czech Republicand the Slovak Republic, by establishing two separate ALES corporations. The two entities however work closely together to provide their customers with the most advantageous innovations and latest technologies. In 2008, ALES became a member of the ICZ group, the largest software provider in the Czech Republic.