1 Key 1 to Key 2 is the first half step. 2  Key 2 to Key 3 is the second half step. 3  An accidental is a sign used to raise or lower the pitch of a note. 4  The first accidentals that we will discuss are the flat and the sharp. 5  The flat lowers a note by a half step while the sharp raises a note by a half step.
Ed Roberts, the president of MITS Incorporated, who designed and built the Altair. A supporting cast at Ziff Davis (publisher of Popular Electronics), and at MITS in Albuquerque, composed of Don Lancaster, Forrest Mims, and David Bunnell, who are well known in the personal computer industry, and a lot of people not so well known.
What Was The First PC? The Computer Museum in Boston asked that question in 1986, and held a contest to find the answer. Judges settled on John Blankenbakerâs Kenbak-1 as the first personal computer. Designed in 1971, before microprocessors were invented, the Kenbak-1 had 256 bytes of memory and featured small and medium scale integrated circuits on a single circuit board. The title of first personal computer using a microprocessor went to the 1973 Micral.