“Then he began writing the software that would get the microprocessor to display images on the screen. Because he could not afford to pay for computer time, he wrote the code by hand. After a couple of months he was ready to test it. "I typed a few keys on the keyboard and I was shocked! The letters were displayed on the screen." It was Sunday, June 29, 1975, a milestone for the personal computer. "It was the first time in history," Wozniak later said, "anyone had typed a character on a keyboard and seen it show up on their own computer's screen right in front of them.”