A few months ago I introduced you to one of the more notable Apple pre-production units in my collection, a late prototype Macintosh Portable. But it turns out it's not merely notable for what it is than what it has on it: a beta version of System 6.0.6 (the doomed release that Apple pulled due to bugs), Apple sales databases, two online services — the maligned Mac Prodigy client, along with classic AppleLink as used by Apple staff — and two presentations, one on Apple's current Macintosh line a...