Digital text conundrum

From a posting made yesterday by Tim Bray:

Here’s a puzzle: what’s the oldest electronic text? Let’s qualify that a bit, stipulating that the text should be substantial in size and essentially unchanged since first committed to bits. I suggest that when this artifact is identified, a paper version should be produced, to ensure that we don’t lose an important piece of our heritage. ¶

If you have nominations for this designation, post them in the comments field below.