While reading a book, I came across the word I'd've, as in: I'd've argued against it. While it was obvious what it meant, it left me puzzled. Is I'd've a proper word?
When is it grammatically correct to create a contraction of words followed by "is"? For instance is "who's" a correct short form of "who is"?
Modem is a common word for modulator/demodulator. Is there a word that in a similar fashion (or in general) would describe the encoder and decoder functionality presented in one piece?