2 ;;Quote: with interactive computing, make frequent use of selecting displayed text by pointing

2 ;;Quote: most interactions with a system are related to recent events; pronoun reference by pointing to portions of these events

2 ;;Quote: user views environment through windows for each task or aspect; may overlap

3 ;;Quote: with a mouse, can suspend typing an operation, do something else, and return to continue typing

6 ;;Quote: even though PROMPT window requests a button event; can do other things instead; just a suspended co-routine

8 ;;Quote: in Programmer's Assistant, holding down the mouse button performs the command without making any changes

8 ;;Quote: selecting text with the mouse is exactly the same as typing it

12 ;;Quote: need to continue computation after an error when lots of computation, 'unclean state', or interactive debugging

14 ;;Quote: windows in the Programmer's Assistant appear to manage themselves, though the user can change position, size, etc.

15 ;;Quote: use the command history to test previous commands with different values