Many fashion trends from the 2010s have made a surprising comeback.

Journalists often compare events in the 2020s to earlier decades when analyzing long-term social trends.

The pediatrician explained that trisomy 21 often causes characteristic facial features and developmental delays, and recommended early intervention services.

The team's strategy 2.0 showed how they intended to adapt to changing markets.

I swapped the old 21700 in my flashlight for a higher-capacity cell so it lasts through the night.

The technician replaced several 2170 cells to extend the electric vehicle's range.

213 is shorthand for the parts of Los Angeles where my grandparents grew up, so seeing that number on my caller ID felt like a trip home.

Even after moving away, I'm still proud to be a 201.

The captain updated the recruit's 201 with the latest evaluation reports and training certificates.

The drone's battery bay can hold four 21700s for extended flight time.