The unofficial MACE software was later chosen over the official SCOPE product as the basis of the next CDC operating system, Kronos, named after the Greek god of time. The story goes that Dave Mansfield called the University of Minnesota library and asked for an ancient word meaning "time". He wrote down "Kronos" instead of "Chronos". The main marketing reason for its adoption was the development of its TELEX time-sharing feature and its BATCHIO remote batch feature. Kronos continued to use the COS/SCOPE 1 file system with the addition of a permanent file feature.