In a system of locks, typically lockers for temporary use, but also including long-term lockers and locks in office furniture, each electronic lock has an access terminal for entry of a user's code. The electronic locks each have a processor and a programmable memory to receive inputs for setting and resetting access codes for the lock. The system includes a smartphone or other hand-held computer device, with a program for control of lock access. When locks of the system are to be set as to permitted access, or operating parameters of locks are to be adjusted, or for downloading information from the lock, information is entered into the smartphone and downloaded to a portable electronic data key. The data key is then touched to contacts of each lock to be affected, whereby the locks are set or the locks provide audit data to the smartphones.