How many Oscars has Steven Spielberg won, not counting his Memorial Award?

Interesting fact:

Steven Spielberg so thoroughly enjoyed the experience of directing Indiana Jones: Raiders of the Lost Ark that he became extremely motivated by jealousy to make a sequel! The film was so successful that he knew that someone would eventually make the sequel, and he wanted to ensure that that person was him! “I knew that if I didn’t direct Temple, someone else would. I got a little bit jealous, and I got a little bit frustrated.” – Steven Spielberg