The employer with the most IT job postings last year was Amazon.com, with 16,146 ads, exceeding most other IT firms by a wide margin, a new report says, according to ComputerWorld.

The three top runners-up in 2013 U.S. job postings were Accenture, at 14,240 and Deloitte, at 13,077 job ads, according to CompTIA's annual IT Industry Outlook report.

Accenture, recently hired by the U.S. government to be the new lead contractor for the troubledHealthcare.gov web site, and Deloitte, are IT services firms. Amazon recently won a contract with the CIA to develop a compute cloud. It has been hiring IT staff with security clearances,ComputerWorld says.

CompTIA based the report on data from Burning Glass Technologies in Boston, which analyzes online job postings from approximately 32,000 jobs sites.

Microsoft had the fourth most IT job postings at 12,435, followed by Best Buy with 10,725 job ads, and IBM at 10,221, according to CompTIA, a trade association that also runs a professional certification program.

Best Buy's IT hiring may be due to its computer user support and Geek Squad operation, said Matthew Sigelman, the CEO of Burning Glass.

Sigelman said Best Buy's hiring also represents the growing importance of "middle skill" IT jobs, or those that don't necessarily require a bachelor's degree. Last year, Burning Glass saw about 200,000 job ads in IT that did not require a bachelor's degree, he said.

In its forecast for the year ahead, CompTIA predicts a worldwide IT industry hiring growth rate of 3.4% with upside potential of 5.9%. Its survey found that mid-sized IT firms will be more aggressive in hiring for both technical and non-technical positions.