binary mode vs text mode

[targt123]

What is the difference between writing an output file in binary mode vs. other non binary modes. Can a text file be saved in both binary and non binary mode?
What are the advantages and disadvantages and how do these affect the memory usage?
Thanks

[LB]

http://bytes.com/topic/c/answers/155972-std-ios-binary

Interesting... even I did not know this.