EATCS cooperates with the Special Interest Group on Algorithms and Computation Theory (SIGACT), which is the ACM special interest group for Theoretical Computer Science. Among the collaborations is the annual presentation of the Gödel Prize. EATCS encourages memberships of both organisations and there are excellent discounts available: SIGACT members can become EATCS members for EURO 20.- per year (or US$ 23.-). Moreover, EATCS members can join SIGACT at a cost of US$ 15.-.
EATCS cooperates with the Computability in Europe (CiE), which promotes the development, particularly in Europe, of computability-related science, ranging over mathematics, computer science, and applications in various natural and engineering sciences such as physics and biology and the promotion of the study of philosophy and history of computing as it relates to questions of computability. CiE organises the CiE Conference Series (CiE-CS)
EATCS cooperates with the European Association for Computer Science Logic (EACSL), which promotes computer science logic in the areas of scientific research and education. It supports both basic and application oriented research. The association also intends to advance the connections between basic research and industrial applications. EACSL organizes each year the Conference on Computer Science Logic (CSL) and grants the Ackermann Award, for outstanding dissertations in Logic in Computer Science.
EATCS cooperates with the European Association for Programming Languages and Systems (EAPLS), which promotes research in the area of programming including theory, language design, language implementation, and language use. EAPLS coordinates and sponsors conferences and courses on specific subjects in Programming, and stimulates the dissemination of information concerning scientific events in this area.
The British Colloquium for Theoretical Computer Science (BCTCS) is an annual event for UK-based researchers in theoretical computer science. A central aspect of BCTCS is the training of PhD students, providing an environment for students to gain experience in presenting their work, to broaden their outlook on the subject, and to benefit from contact with established researchers.