Today marks 11 years since Apple co-founder Steve Jobs died from a rare form of pancreatic cancer.

Apple CEO Tim Cook took to Twitter to commemorate the tech visionary.

The tweet includes a photo of Jobs and a message about how his work helped catalyze change.

“Steve showed us all, again and again, that a great idea really can change the world.

Remembering him today and always,” Cook wrote.

Steve showed us all, again and again, that a great idea really can change the world.