1. United States - Software
United States Patent Office (USPTO) has granted software patents since the early 1970s.
US 3,552,738, US 3,553, 384, US 3,996,354, Earlier patents may exist.
In a 1972 decision, Gottschalk v Benson, the United States Supreme Court found that “patent[s] for any program servicing a computer” are not precluded from patentability. source: 409, U.S. 63 (1972)
In 1996, USPTO issued “Final Computer Related Examination Guidelines” stating “computer related inventions are statutory subject matter”.

2. United States - Software
Over 150,000 patents have been issued by the USPTO in the area of computer implemented inventions.
en.wikipedia
In the last 25 years, the number of patents granted towards computer implemented inventions has continued to increase every year.

3. United States - Software
source: en.wikipedia