He's referring to OpenOffice (see openoffice.org) ... the Writer program. It has a built in bit that will pop up a possible ending to a word as you type (as in his example, dictionary - when you type dict it will pop up ionary at the end, and you can "accept" that by hitting enter).
It's a pretty handy thing, once you get used to it!
i believe this is the same application my hubby was telling me about. he said he finds it more convenient to use. although i haven't tried it, my only concern in using it is when i save my files using it and have to open them in another computer such as in an internet cafe.