Editing Astrophysics Data System (section)

==Software and hardware==
The software runs on a system that was written specifically for the ADS, allowing for extensive customization for astronomical needs that would not have been possible with general purpose [[database]] software. The scripts are designed to be as [[platform independent]] as possible, given the need to facilitate mirroring on different systems around the world, although the growing use of [[Linux]] as the [[operating system]] of choice within astronomy has led to increasing optimization of the scripts for installation on that platform.<ref name="architecture"/>

The main ADS server is located at the [[Harvard-Smithsonian Center for Astrophysics|Center for Astrophysics {{!}} Harvard & Smithsonian]] in [[Cambridge, Massachusetts]], and is a dual 64-bit X86 [[Intel]] server with two quad-core 3.0 [[GHz]] [[Central processing unit|CPU]]s and 32 GB of [[random access memory|RAM]], running the [[CentOS]] 5.4 [[Linux]] distribution.<ref name="data" />  As of 2022, there are mirrors located in China, Chile, France, Germany, Japan, Russia, the United Kingdom, and Ukraine.<ref>{{cite web |title=SAO/NASA ADS at SAO: Mirror Sites |url=http://doc.adsabs.harvard.edu/mirrors.html |archiveurl=https://web.archive.org/web/20220128092136/https://doc.adsabs.harvard.edu/mirrors.html |archive-date=28 January 2022 |access-date=26 July 2024 |publisher=Harvard-Smithsonian Center for Astrophysics}}</ref>