# Software Update: The ORCA Program System—Version 6.0

“Software Update: The ORCA Program System—Version 6.0” (2025), by Frank Neese. Physics and Astronomy research paper. Original abstract below, unchanged. No free PDF was found.

- Authors: Frank Neese
- Published: March 1, 2025
- Field: Physics and Astronomy
- DOI: https://doi.org/10.1002/wcms.70019
- Source: https://doi.org/10.1002/wcms.70019

## Abstract

Version 6.0 of the ORCA quantum chemistry program suite was released in July 2024. ORCA 6.0 is a major turning point in the history of the program since it represents a near complete rewrite of the code base that leads to: (1) major performance improvements, (2) a clean and highly efficient code base that greatly facilitates future development, (3) a large amount of new functionality, and (4) new interface capabilities that facilitate inter‐operability with other quantum chemistry program packages. The article describes the most salient features of the program.

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