# Access

CNCA is **open** to all academic and scientific researchers and institutions. In order to use our services please go to the [__CNCA portal__](https://www.acnca.pt/registo/sign.php?lang=en) and follow the instructions there. For guidance and further information about the access conditions see the [__FAQ List__](http://docs.ncg.ingrid.pt/books/frequently-asked-questions) 


**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__](https://www.acnca.pt/?p=policy).

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.