shorTEXT

OK image src

O.K.
http://en.wikipedia.org/wiki/Okay

k or kk
commonly used in instant messaging, or in SMS messages.
B4 the days of SMS, 
"K" was used as a Morse code prosign for "okay."

etc.
Et cetera

i.e.
http://en.wiktionary.org/wiki/i.e.

QED
http://en.wikipedia.org/wiki/Q.E.D.

Viz.,
http://en.wikipedia.org/wiki/Viz.

cf.
https://en.wikipedia.org/wiki/Cf.



FYI
http://en.wikipedia.org/wiki/FYI 


et al.
http://www.thefreedictionary.com/et+al.

etc.


best wishes O! K!,
sai bbhai.