Today, computer companies (1)_____ sell many (2)_____programs for computers. First, there are programs (3) ____math problems. Second, there are (4)____. for scientific studies. Third, some programs are (5)______fancy typewriters. They are often (6)______by writers and business people. Other programs are (7)_______made for courses in schools and universities. And (8) _____ there are programs for fun. These (9)______word games and puzzles (10)____ children and adults.