I wouldn’t call it a scientific journal, but I always find something interesting to read in the Communications of the ACM.

https://cacm.acm.org

For Java, I guess this as official as you can get.

https://www.oracle.com/technetwork/java/codeconventions-150003.pdf

Google is an advertising company. Something like 80% of their revenue comes from selling ads.

How would spending money on Gitlab support their primary business.

The TelePort Gold II came in at a speedy 14.4 Kbps. It came with my Macintosh Performa.