1.   Manufacturers have expended a lot of time and effort trying to improve computer security.

2.   The virus utilities are a must for every computer user concerned with computer security.

3.   Users and manufacturers have expended a lot of time and effort trying to find ways to improve computer security.

4.   Although determined hackers can breach the tightest computer security, Mr Hook insists that there are precautions organisations can take to lessen the risk.

5.   Anderson is a well-known computer security researcher whose work in both computer security and cryptography is widely recognized.

6.   As for computer security, every merchant handles the issue differently.

7.   Because of concerns about computer security, individuals cannot file electronic returns directly with the IRS.

8.   Bellcore is now a unit of Science Applications International Corp., a private company based in San Diego that is best known for its work in computer security.

9.   A number of computer security companies now sell cables, clamps and sundry other locks to secure desktop computers and laptops.

10.   A. At least two prominent threats to computer security have been widely reported the last few weeks.