Technology has changed a lot for the past few years and we couldn't imagine hanging out with friends without carrying any cash. Now, we can absolutely do that and more. The touchscreen was an amazing breakthrough in mobile phones, but it's now a mandatory feature and buttons are going away. What else are the things that your children now grow up with? Do they seem like they're taking those things for granted?

As a millennial, you can remember all these things vividly as they were part of your childhood, growing up in happiness and sadness with. Here are 19 of the most millennial-thing that younger generations don't know of and they just make you feel so old.

#1 Why did kids think we came up with abbreviations?

Jonathan -Via

#2 This projector.

kenzie_bug20 -Via

#3 On VHS tapes.

BdanksAnthony -Via

#4 When language fails to keep up with the change of time.

Jason English -Via

#5 Once upon a time, our phones had visible antennas.

☆ destiny rosa ☆ -Via

#6 We're not... that old... right?

jodierandazzo -Via

#7 Skipping ads are now taken for granted.

Ty Morrow -Via

#8 Why people used to say you 'roll down' your window.

MarcSebens -Via

#9 A whole generation who believes these floppy discs were 3D-printed.

bill_gross -Via

#10 This beeper/pager.

Dontmesswithme -Via

#11 This generation who doesn't how burning CDs work.

teriamour -Via

#12 Now we want MySpace back.

vinnycrack -Via

#13 And these pencil sharpeners.

Greg Wyshynski -Via

#14 On knowing the time to get new flashcards.

i Bomb Atomically -Via

#15 How you know if your bill is not accepted anymore.

zickmund_ -Via

#16 On ancient payphones.

ashleigh -Via

#17 On download speed and Napster.

angryblkmanDC -Via

#18 On tape players.

TheJordanMiller -Via

#19 And on everything without touchscreen.

Fernando Torcelly -Via