Undisputed Attitude

Four simple questions.

Answer in rot13 (http://www.rot13.com/) in the comments section.

- Vaibhav.

The questions:

1. The German government issued a set of regulations, effective April 1, 1905, which introduced three new conventions:

1. Ruhezeichen ("Cease-sending signal")
2. Suchzeichen ("Quest signal")
3. Notzeichen

How do we know Notzeichen better?

2. On March 18, 1995, a certain person issued a two-word press release: "I'm back." Name the person, and give funda.

3. Which site devoted to movie reviews takes its name from a practice of old time audiences on watching a play they didn't like?

4. Fill in the blanks.

McDonalds
Chinese army
US department of defense
_____________________
Walmart
National Health Service(UK)