Pun on kidnapping with two common meanings:
(1) Refers to a software developer copying third party source code into his work, thereby infringing third-party copyright. In poorly run software-development houses, this can be a significant problem. The code may often come from a previous job or project or indeed be obtained from a friend or off the Internet; or
(2) Refers to employees or contractors withholding developed code (or source code deliverables and/or documentation) until paid-in-full or paid additional money for their work.