In just a few decades, technology has gone from Walkmans that play cassette tapes to iPhones that play music and videos, make calls, connect to the internet, take photos, and perform countless other tasks.
The swift pace of progress means that some gadgets get left behind.
Here are 16 pieces of technology from the last 50 years that are no longer in use.
FOLLOW US: INSIDER is on Facebook
This original portable music player was popular during the 1980s. The first model sold only 3,000 units in its first month of release in 1979. Clever marketing on the streets of Tokyo saved the personal cassette player, and sales soared the very next month. Sony stopped producing new Walkmans in 2010 after a successful 30-year run.
Emergency services still use pagers since they're more reliable than cell phones during natural disasters, but they've otherwise vanished from popular use.
The Motorola RAZR was released in 2004 and became the best-selling flip phone of all time with over 130 million sold over four years. The iPhone made it pretty obsolete — a 2008 report found that 23.8% of iPhone users had switched over from the RAZR.