The Ferranti Mark 1 computer worked in integer arithmetic, and the engineers built the computer to display the lines of data on the CRTs with the most significant bit on the right due to their background in radar. This could be argued as the logically sensible choice, but was changed to the more conventional system of the most significant bit on the left for the Mark 1 Star. The Mark 1 Star worked with both fractions and integers. The Baudot teleprinter code was also abandoned for one that was in the following order: