Hardware & Software Requirements
Hardware
Computer
- Microsoft® Windows® compatible PC
- Minimum: Pentium 4 (2.4 GHz)
- Recommended: Intel compatible multi-core processor (2.0+ GHz preferred)
Memory
- 512 MB (RAM)
- 768 MB recommended to use CAS Registry BLAST®, Analyze Plus, or post-processing tools
Recommended: 2+ GB RAM
Available Hard Disk Space
- 160+ MB
- 146 MB required when installation includes CAS Registry BLAST and Merged Markush Service (MMS)
- 14+ MB recommended for transcripts, tables, reports, etc.
Connection
- Internet connection that supports the telnet protocol through port 23 (standard Winsock connection) or the HTTPS protocol through port 443
(SSL/VPN connection) - Automatic updating of support files and access to ChemPort, STN Viewer, and online Help on the CAS server require an HTTP application-level
connection through port 80 - CAS Registry BLAST, CAS Full Text Options, and the SSL-VPN connection option require an HTTPS application-level connection through port 443.
Software
Operating System and Web Browser
- Microsoft Windows XP SP3, Vista (Enterprise, Business and Home Basic) SP2, or Windows 7 (Windows 7 Starter version is not supported)
- Microsoft Internet Explorer, Version 6.0 or higher,
or
Mozilla Firefox Version 3.6 or higher - ActiveX, Java and JavaScript must be enabled
- Pop-ups must be allowed from www.cas.org to access STN Express Online Help
Additional Software
- Microsoft Excel® 97, 2000, 2002, 2003, 2007 or 2010 for the Analyze Plus Wizard and CAS Registry Number and Role Report Wizard
- QuickTime 7 for viewing images in STN Express transcripts
- Adobe Reader for viewing PDF outputs for tables, reports, and transcripts

