Who are the Publishers of Computer Science Research?
To answer this question, I downloaded the DBLP database and used the DOI publisher prefix of each publication to determine its publisher. I grouped the 3.4 million entries by publisher and joined the numeric prefixes with the publisher names available in the list of Crossref members. Based on these data, here is a pie chart of the major publishers of computer science research papers.
The chart lists the top-20 publishers from the about 150 found in the DBLP database. The IEEE leads with 44% of the total. Then comes Springer with 21%, Elsevier with 12%, and ACM with 9%. All the rest publish fewer than 2% of the papers. The accuracy of this information obviously depends a lot on the extent of DBLP's coverage and also on the covered venues selection correctness. Some publishers use multiple prefixes, because they have acquired others in the past. I have merged the most important cases.
I created the list by orchestrating a few Unix command pipelines with the following Makefile.
Running make on this file, will execute the following commands.