Environmental Design Solutions Limited (EDSL) was formed in 1989 to commercially develop Tas Software. EDSL sells Tas software and consultancy services using Tas. EDSL believe that the mixing of development, consultancy and software support leads to a focused software product, with quality support available to end users.

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You will require a valid key to be able to use Tas.
Ensure your dongle is plugged in and functioning correctly before proceeding.

Tas 9 Keys

Keys for the current generation of Tas are available from this page.

Tas 8.5 Keys

Users of legacy versions of Tas may use this page to update their keys.

Ecobim Keys

Keys for Ecobim are available from this page.