Large collection on electronic books on information technology and related topics. Specific topics include:

• Applied Sciences
• Artificial Intelligence
• Business
• Certification
• Computer Science
• Databases
• Desktop Applications
• Desktop Publishing
• E-Commerce
• Enterprise Computing
• Graphics
• Hardware
• Human-Computer Interaction
• Internet/Online
• IT Management
• Markup Languages
• Multimedia
• Networking
• Operating Systems
• Programming
• Security
• Software Engineering

Publishers include Addison-Wesley, Alpha, Financial Times Prentice Hall, Cisco Press, New Riders, Peachpit Press, Prentice Hall PTR, Que and Sams

As of July 2003 Safari Tech Books Online replaced Books 24x7, which is no longer available.