Access CNCA is open to all academic and scientific researchers and institutions. In order to use our services please go to the CNCA portal and follow the instructions there. For guidance and further information about the access conditions see the FAQ List warning Please note that users must comply with CNCA AUP in order to use CNCA services. Users must register using an official institutional email address for all contacts with CNCA (commercial service provider e-mail addresses are not accepted). Please see the CNCA Terms and Conditions for Access for more information CNCA AUP . CNCA computing services: Deucalion is the largest High Performance Computing system of CNCA. Cirrus are medium size High Performance Computing and High Throughput Computing systems. There are two Cirrus systems Cirrus-A in Lisbon and Cirrus-D in Vila Real. Stratus is the cloud computing service of CNCA for virtual machines, Linux containers and object storage.