Doubt for using the card Arduino UNO

Hi! I am a beginner to work with the Arduino cards.
My project is: Make a home security system with sensors for intrusion detection and a GSM shield for notificaion.
After many researches, i find that the card Arduino UNO is the most used one for this project.
I would know,please, if i can use more than two sensors on this card.
(sensors for detection of: the opening of the door, motion, smoke and glass breakage)
Any help appreciated.
Thanks.

I would know,please, if i can use more than two sensors on this card.

Yes you can.

Thank you for your hep :slight_smile: