Series 66. What is the 'Series 66'. Series 66 is an exam administered by the Financial Industry Regulatory Authority (FINRA). Successful completion of the Series 66 exam is equivalent to successful completion of both the Series 63 and Series 65 exams.
The earliest optical mouse came out in 1980. One of the earliest prototypes was invented by Steve Kirsch at MIT. Another optical pointing device was invented by Richard Lyon. These early devices would play a role in changing the history of the computer mouse.
The mouse was invented by Douglas Engelbart in 1964 and consisted of a wooden shell, circuit board and two metal wheels that came into contact with the surface it was being used on. It was 8 years later in 1972 that Bill English developed the design further by inventing what is known as the Ball Mouse that we know today.