The term 'USED AN OLIVETTI' refers to a person who has operated an Olivetti typewriter. Olivetti was an Italian manufacturer of typewriters, computers, and other office equipment that was founded in 1908. The company was known for its stylish designs and quality products, and their typewriters were popular in the mid-20th century. Typing on an Olivetti typewriter requires skill and precision, and those who have used one are considered to have a special expertise.