Technology Sector
- Dell Inc.: www.dell.com
- Hewlett-Packard Company: www.hp.com
- CDW Corporation: www.cdw.com
- Global Computer Supplies Inc.: www.globalcomputer.com
- Microsoft Corporation: www.microsoft.com
Communications Sector
- Verizon Wireless: www.verizonwireless.com
- Sprint Nextel Corporation: www.sprint.com
- Vonage Holdings Corporation: www.vonage.com
Financial Sector
- American Express Company: www.americanexpress.com
- Capital One Financial Corporation: www.capitalone.com
- Discover Bank: www.discovercard.com
Other B2B Sectors
- California Chamber of Commerce: www.calchamber.com
- Kiplinger Tax Letter: www.kiplinger.com
- Learning Tree International: http://www.learningtree.com/