Simplify the following text for a Grade 12 native English-speaking person.
Original: In May 1972 , William Millard started businesses individually as IMS Associates ( IMS ) in the areas of computer consulting and engineering , using his home as an office .
Simplified: In May 1972 , William Millard began business as IMS Associates ( IMS ) in the area of computer consultancy and engineering , using his home as an office .