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I was reading this paper https://web.archive.org/web/20140331191527/http://bitcoinhistory.net/Technical_Papers/ProgrammingBitcoinTransactionScripts.pdf and I have the following question:
ScriptPubKey accompanies a transaction output and specifies under which conditions it can be claimed. ScriptSig accompanies a transaction input and is used to prove that the referenced output can be rightfully claimed.
So in page 2 the ScriptSig should be in Input TX and ScriptPubKey should be in output TX? Author says that scriptA is ScriptSig.

1the link you posted is dead, at least for me – Dennis Kriechel – 2014-07-02T15:00:31.263
Here's a mirror. – Buge – 2014-07-03T02:03:42.497