Over the decades, there have been a great number of things to celebrate.

COSI's Huge 50th Anniversary Celebration

Celebrating their 40th anniversary, COSI released this brochure.

Celebrating their 25th anniversary, COSI had a big event with balloons outside.

COSI has a long traditions of Christmas celebrations.

On COSI's last day it had a closing ceremony.

A little before COSI's last day, in late August 1999, it had a party for volunteers and former volunteers.

COSI had a big celebration for the beginning of work on the new COSI in 1997.

COSI celebrated Christmas throughout the years.