This feature should've been added a long time ago: Google Docs indexes PDF files and you can finally search the contents of all your files.
Google Docs search has been recently improved by adding support for automatic stemming and synonyms, so you can search for [create shortcut] and find documents that contain [creating shortcuts] or [creates a shortcut].
To make things even better, Google should detect scanned PDF documents and use OCR to extract text. This feature is already used by Google's search engine to index scanned documents and it's available as an experiment for Google Docs API.
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