Ian Knot = Ian's Fast Shoelace Knot. I tie my shoelaces with my own Ian Knot, the World's Fastest Shoelace Knot: Make a loop with both ends and simultaneously pull them through each other to form an almost instant knot. It's a truly revolutionary way to tie your shoelaces! Recommended!
Text telephone (TTY) mode is used for text communication over a telephone line. A TTY device must be connected to the computer to interpret the modified audio; otherwise you might experience poor audio quality during the call. Using TTY mode in a conference call might also cause audio quality issues. By default, TTY mode is turned off. You can turn on TTY mode by clicking Phones in the Lync - Options dialog box. You will then need to sign out of Lync 2010 and sign back in to use the feature.
The 'c' means it's a character device. tty is a special file representing the 'controlling terminal' for the current process. Character Devices. Unix supports 'device files', which aren't really files at all, but file-like access points to hardware devices. A 'character' device is one which is interfaced byte-by-byte (as opposed to buffered IO). TTY /dev/tty is a special file, representing the terminal for the current process.