An answer to this question could be covered only in a book of about 500 pages
here's a few big changes since the early 20th century
1. Legalization of the forward pass
2. legalization of a one-line pass
3. phasing out of the sixth skater "Rover" position
4. positional goaltending
5. butterfly goaltending
6. the soviet system of coordinated team offense and team defense and larger reliance on horizontal play
7. an increase in offensive responsibilities for defensemen
8. bigger pads, sturdier helmets, visors
9. the instigator rule
10. the breakdown of the Soviet Union and the influx of foreign players into the NHL
11. the emergence of the US as a legitimate hockey power
12. massive expansion into non-traditional hockey markets
13. Wayne Gretzky playing for LA which indirectly affected the above two
and about 500 other things
yes it has changed over many years
Computers have changed in many ways over the years. Technology has advanced< and it has become more easy to do stuff!
Lol it hasnt...
golf has changed as it was once wood and now it has became metal ]
it is now electronic
Hockey has through the equiment and the players .
yes it has changed over many years
Hockey's rules were created by it's creator, but over time, we changed to rules to our liking.
Because people's interest has changed over the years.
Wave rock has changed over the years because it has changed colour
has hats changed over the years
Canada did, over a hundred years ago.
Computers have changed in many ways over the years. Technology has advanced< and it has become more easy to do stuff!
it changed by... well it changed... It just changed!
The actors over the years have changed
whyhas the milk packaging changed over the years
Yes, maps have changed over the years. People are currently using the digital maps in this digital age.