Objective-C:https://developer.apple.com/documentation/objectivec
PHP:https://www.php.net/manual/en/funcref.php
Java:https://docs.oracle.com/en/java/javase/11/docs/api/
CSS:https://www.w3schools.com/cssref/
Python:https://docs.python.org/3/library/index.html#library-index
Perl:https://perldoc.perl.org/modules#Standard-Modules
Ruby:https://ruby-doc.org/stdlib-3.1.2/
HTML:https://www.w3schools.com/tags/default.asp
JavaScript:https://www.w3schools.com/jsref/default.asp
ActionScript:https://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/index.html
ASP:https://www.w3schools.com/ASP/asp_quickref.asp
Groovy:https://groovy-lang.org/gdk.html
Scala:https://www.scala-lang.org/api/current/index.html