I have downloaded a dataset about Affymetrix gene expression from GEO, and I found that the probes ID are listed like:
and each of them is followed by the expression value. I know that all these probe ID can be converted to gene names. But my question is what's the meaning of the probe ID order? Why they are sorted like this and what's the meaning behind the sorting? I have tried to convert all probe IDs into gene symbols but can't find a clue about why they should be sorted in this way. It's like a random arrangement but I can't find any evidence either.