Example 1 Take $5 from your wallet to pay for a sandwich. That bill is a capability. You can't accidentally give away your car when you do it. You can easily

Example 1 Take $5 from your wallet to pay for a sandwich. That bill is a capability. You can't accidentally give away your car when you do it. You can easily delegate the giving of the $5 to someone else safely. Example 2 Take a file on a floppy disk for an IBM XT and make a backup of it. You can hand that backup disk to anyone and your original is safe. You can use that file with any random shareware disk from your user group meeting and in no way could it cause you any more loss than the disk in it is on. A disk is a capability. Example 3 You are asked your location. You reply correctly. The answer does not allow you to be tracked forever. Example 4 You have a 15 amp outlet. You can't take down the power grid by accident, nor burn down the house. The outlet is a 15 amp capability.