1.   If there is still any doubt, the LIFESPAN validation program can be used to check for self consistency of the database.

2.   Some word processing packages have additional programs which can be used to check spelling errors or produce indexes.

3.   Aside from movie databases, which he uses to check quotations from films, Kaplan said he relied mostly on printed sources.

4.   At the airport, which reportedly received two hoax bomb threats last week, X-ray machines and bomb-sniffing dogs are used to check luggage for bombs.

5.   But a test model was used to check the magnets on the giant Superconducting Supercollider particle accelerator in Texas before Congress canceled funding for the project.

6.   Drug-sniffing dogs are used to check some vehicles before they arrive at an inspection booth.

7.   Eventually, it would also be used to check carry-on bags, the company said.

8.   He speculated the bug was not caught until now because there may have been a flaw in a program that is used to check chips for errors.

9.   In some cities, bomb-sniffing dogs were used to check facilities.

10.   In some states, young volunteers are used to check if retailers are violating the law.