The history of Which Resource Management Task Deploys or Activates Personnel And Resources is a bit of a mystery. From looking at the definitions of the term, it is clear that it has been around for quite some time But this is not the same as understanding the history of the discipline We have only recently begun to pay attention to this area. Even though it was more than 20 centuries ago, we didn't begin paying attention to this until about 1980 Before that, we had to make do with manual methods of tracking everything. It wasn't until people started to use computers for calculating things that they were able to calculate how many man-hours were required for certain jobs.