For one thing, the database is quite large. For another, until fairly recently, most of the information has not been available electronically. The rest of each line contains the year this person's first joint paper with Paul Erdos was published. If they have published more than one joint paper, then the number of joint papers is also given. Erdos0p is similar to Erdos0d, except that it is sorted by the number of joint papers and contains only those 188 people with more than one joint paper with Erdos.
Secondary sort is by year of first paper, most recent first.
Erdos1 contains the same information as Erdos0, together with a list of each author's collaborators following his or her name. A blank line follows each such sublist. Erdos2 is a kind of inverse of Erdos1. The capitalization convention explained above is maintained. Note that only those co-authors with Erdos number 1 are listed for these people.