After graduating from high school in 1973, Gates attended Harvard University. At first he planned to study as a lawyer, but he continued to spend much of his time on computers. He also kept in touch with his friend Paul Allen who was working for Honeywell.When the Altair personal computer came out in 1974, Gates and Allen decided they could write a BASIC software program to run on the computer. They called up Altair and told them they were working on the program. Altair wanted a demonstration in a few weeks, but Gates hadnt even started on the program. He worked hard over the next month or so and, when they finally went to New Mexico to run the software, it worked perfectly the first time.