Cats rely heavily on scent and will remember owners by their distinctive smell.

Cats recognize their owner's voice and intonation patterns. They respond best to familiar voices.

Cats can recognize individuals' faces, especially if they have distinctive features like glasses or facial hair. 

Cats remember the experiences they've shared with their owners, like feeding, playtime and cuddling.

Cats have better short-term memory than long-term. Older memories may fade over time.

Cats may need reminders by scent and voice after months apart before fully recognizing owners again.

Following familiar routines with owners helps reinforce cats' memories of their people.