It gets worse with new words. Sometimes, there's a "correct" way of deriving the article I guess, but it sounds weird.

For example Blog. Correct would be "das Blog" (because "das Web-Log" = "das Logbuch" or "das Protokoll"), but "der Blog" sounds nicer imho. Some people say "das Laptop" although this sounds off for most and "der Laptop" is correct.

For other words, the article can change over time. Correct is "das Virus", because it's a Latin word and the ending -us comes with "das". But most people say (and the media writes) "der Virus".