The given pie charts compare the proportions of time spent on different activities in the office in the US in 1980 and 2000.
Overall, it is noticeable that activities, namely computer, phone, paper documents, and meetings, changed noticeably, while other activities and face-to-face communication remained unchanged. Another interesting point is that employees did not spend time on email in 1980, but they started to allocate time for that twenty years later.
As regards the activities that changed the most, the phone was the most popular activity (30%) at the beginning, but then it dropped significantly to just under one-fifth of the total. Although the computer was the least popular in 1980, it went up dramatically to almost one-third of the total. Moreover, the paper document halved from 20% to 10%. It was also the case for the meetings, which decreased to 6%.
The activities that stayed the same were face-to-face communication (14%) and other activities (15%). Additionally, despite the fact that the email was not in the list of activities in 1980, people started to allocate time to that, which accounted for 8%.