A number of device interfaces that may use magnetic forces to secure different devices together are disclosed. The device interfaces may include magnetic material positioned in between parallel rows of electrical contact elements in the devices. Magnetic forces may be exerted on and from the electrical contact elements to cause mutually cooperating elements from the devices to be substantially attracted and drawn towards each other. Once the contact elements make contact and are engaged, their mutual attractive forces may cause them to resist being separated. Additionally, the distal ends of the contact elements may have mutually cooperating male and female engagement surface configurations.