WordStar and Lotus 123 were the killer apps of DOS until Windows reared it's head.
That just means that you never used PC Write. No one went back to WordStar after using PC Write. No one. There was even a way to get it to pause (now I've long forgotten how) so you could change the daisy wheel to get symbols.
IIRC the story is that Bob Wallace (http://en.wikipedia.org/wiki/Bob_Wallace) would always carry the one-and-only source code floppy with him at all times. He kept it on the passenger seat when driving. Supposedly at some point the floppy failed and he wrote the code to read/write raw floppy disk sectors to recover the source code. That feature was subsequently a part of PC Write.
You don't need to understand the significance of the data to plot it on a chart with the right axes names.
That must be the misperception that causes everyone to make just about every application that displays a chart pretty much useless by extrapolating or connecting dots or applying smoothing when they shouldn't, failing to use appropriate compression functions on axes scales, and not providing widgets appropriate to the tasks in which the data is needed.
I think that comes under the category of "requirements capture". Unless you're an expert in every possible field, the person who generated the data will need significant input into how that data is displayed.
"Money is the root of all money." -- the moving finger