Nielsen Ratings

According to the A.C. Nielsen Co., here are the top ten shows for the week ending July 21, their networks and ratings. (Each rating point equals 959,000 homes.)1. Summer Olympics Opening Ceremonies

NBC, 23.6

2. Summer Olympics (Sun.)

NBC, 22.9

3. Summer Olympics (Sat.)

NBC, 17.7

4. Seinfeld

NBC, 13.8

5. 3rd Rock from the Sun

NBC, 11.6

6. Friends

NBC, 10.8

7. Mad About You Special

NBC, 10.8

8. ER

NBC, 10.5

9. Movie: Awake to Danger,

NBC, 10.2

tie Home Improvement

ABC, 10.2