Quoted from IEEE Spectrum January 2000, http://www.spectrum.ieee.org/WEBONLY/resource/jan02/care2sb1.html

"The Big Kahuna of job sites, Monster (http://www.monster.com), last year bought two competitors, HotJobs (http://www.hotjobs.com) and FlipDog (http://www.flipdog.com); all three still exist as separate sites. [Editorial note: On 27 December, Yahoo, Inc., successfully trumped a merger agreement between HotJobs and TMP Worldwide Inc, Monster's parent company. Yahoo will be acquiring HotJobs for US$436 million.] Monster's sub-sites list jobs for recent college graduates, MBAs, and high-level executives. Other general job sites include Headhunter (http://www.headhunter.net) and CareerBuilder (http://www.careerbuilder.com), a meta-site that searches more than 70 job sites.

See also TechOnLine (http://www.techonline.com), which caters to design engineers.

For posting IT and computer engineering jobs, try Dice (http://www.dice.com),  ComputerJobs (http://www.computerjobs.com), Ecruitinginc (http://www.ecruitinginc.com), and TalentRock (http://www.talentrock.com).

The tech section at Guru (http://www.guru.com) is primarily for IT professionals who work as independent contractors. Other sites for IT contractors include Elance (http://www.elance.com), ICPlanet (http://www.icplanet.com)

Trying to fill that corner office? Look up ExecuNet (http://www.execunet.com), which lists upper-management jobs with annual salaries of at least US $100 000. CacheMirror (http://www.cachemirror.com) posts jobs starting at $70 000 per year.