Giac or GIAC may refer to:
*
Global Information Assurance Certification
Global Information Assurance Certification (GIAC) is an information security certification entity that specialises in technical and practical certification as well as new research in the form of its GIAC Gold program. SANS Institute founded the ce ...
, an information security certification entity.
*
Giac (software)
Xcas is a user interface to Giac, which is an open source computer algebra system (CAS) for Windows, macOS and Linux among many other platforms. Xcas is written in C++. Giac can be used directly inside software written in C++.
Xcas has a co ...
, a C++ library that is part of the Xcas computer algebra system
{{disambig