1. 14 July a legal holiday in France celebrating the storming of the Paris bastille in 1789
  2. AND gate a circuit in a computer that fires only when all of its inputs fire
  3. 365 days a year that is not a leap year
  4. 3d radar radar that will report altitude as well as azimuth and distance of a target
  5. 16 PF a self-report personality inventory developed by Raymond B. Cattell to measure the 16 personality dimensions that emerged from his factor analysis of a wide range of traits
  6. 366 days in the Gregorian calendar: any year divisible by 4 except centenary years divisible by 400
  7. 1st class mail that includes letters and postcards and packages sealed against inspection
  8. 440 yards a unit of length equal to a quarter of 1 mile
  9. 880 yards a unit of length equal to half of 1 mile
  10. ABO group a classification system for the antigens of human blood
  11. Aaron Burr United States politician who served as vice president under Jefferson; he mortally wounded his political rival Alexander Hamilton in a duel and fled south (1756-1836)
  12. 401-k plan a retirement savings plan that is funded by employee contributions and (often) matching contributions from the employer; contributions are made from your salary before taxes and the funds grow tax-free until they are withdrawn, at which point they can be converted into an IRA; funds can be transferred if you change employers and you can (to some extent) manage the investments yourself
  13. ABO system a classification system for the antigens of human blood
  14. 15 minutes a quarter of an hour
  15. 60 minutes a period of time equal to 1/24th of a day
  16. 30 minutes a half of an hour
  17. Aare River a river in north central Switzerland that runs northeast into the Rhine
  18. Abies alba tall timber tree of central and southern Europe having a regular crown and grey bark
  19. 8 May 1945 the date of Allied victory in Europe, World War II
  20. ADP system a system of one or more computers and associated software with common storage