Ancient is using carbon paper to make copies of what I was typing. If I screwed up I'd insert a piece of white correction paper to correct the top copy and then use a blade to carve the letters out of the three copies beneath it. Needless to say I learned to type fast and accurate.
I still use the top row to type numbers. Key pads to the side did not exist on typewriters.
Black and white TV was the norm.
Music was played on a stereo or portable player and the records were 45's or 78's, at least in my early years. Then there were LP's and 45's. 8 tracks were the big thing when I was in high school. (Google it)
Math was done on a slide rule.
Ancient is knowing a childhood where during the summer we played outside the entire day. Walked two miles to the swimming pool and never thought about 'stranger danger.'
Those are a few of the things I can think of.
However, having said all this I don't feel ancient.
How 'bout you? You may not be ancient but what are some big changes you've seen.