Hoover's Online - Check out Hoover's Industry Zones, which target industry sectors such as computer hardware, telecommunications and software. Or delve into Industry Snapshots: a bird's-eye view of the business world. A members-only area provides more robust search tools for pinpointing the exact criteria you're after.
e-skills - As the Sector Skills Council for IT, Telecoms and Contact Centres, e-skills UK is responsible for developing the quality and quantity of professional skills in these sectors. This site is a useful point-of-reference for information and sources of information on career opportunities and on the skills required for a career in IT, Telecoms or Call /Contact Centres.