21st century
A great example of 21st century technology that has been remodeled and undergone many changes are earbuds. People used to just carry around boom boxes or have to listen to their music out-loud because there were no headphones to allow them to listen to their music privately. If you wanted to listen to music you had to be aware of everyone around you, especially family members if they were working. The introduction of portable headphones boomed in the 70s where people could listen in peace but they had to carry around cassette players where their headphones could connect. Since then the headphones adapted and got extremely popular and in the early 2000s earbuds were introduced where you just put the earbud in your ear instead of covering your entire ear. Since then many companies have come out with headphones and earbuds that can be specifically used for different things. Many people like working out with sound canceling headphones. There are also wireless earbuds which are the newest c...