1) Fyi 1) Afterthought introducer 2) Bit of chat room shorthand 3) Bit of texting shorthand 4) Chat room Incidentally 5) Chatroom digression shorthand 6) Cousin of FWIW 7) Cousin of FYI 8) Digression shorthand 9) Digression shorthand in IMs 10) Exclusively Saxon word 11) Exclusively Anglo word 12) Incidentally in a chat room 
by the way
By The Way, details ...
Shorthand method of expressing by the way, commonly used in office memorandums and email communications. i.e. 'BTW, there's a diversity training class meeting at 1:00 in the conference room.' (Memorandum at work)
By The Way
A shorthand appended to a comment written in an online forum.
by the way
Short for `by the way`
By the way
(In SMS-language:) by the way
by the way
by the way