Magento 1 Events Cheat Sheet

COMPLETE LIST OF ALL OBSERVER-EVENTS IN MAGENTO 1

Magento 2.1.x vs 2.2.x : Difference in including css,js,google fonts

Magento 2.1.x and 2.2.x have different ways of including scripts

Scripts and css can be included in default_head_blocks.xml file of layout in theme or any custom module.