While reading the QTKit Application Programming Guide I came across the term 'headless environments' - what does this mean? Here is the passage:
...including applications with a GUI and tools intended to run in a “headless” environment. For example, you can use the framework to write command-line tools that manipulate QuickTime movie files.
Answer
"Headless" in this context simply means without a graphical display. (i.e.: Console based.)
Many servers are "headless" and are administered over SSH for example.