Good technology is personalized. One of the things that makes a telephone useful is that you have your own telephone number. In a similar manner, email is useful because you have your own email address. Bank machines would not be at all useful unless they opened your bank account and only your bank account. Some of the simplest technologies succeed because they are personalized.
Personalized housing is made possible with personalized keys, another good technology.
Things like credit cards, smart cards, pagers, cell phones, and eyeglasses are other examples. Bad technology forces you to fit its requirements. Good technology is modular. By 'modular' I mean composed of distinct entities, each of which works independently of the others and may be arranged or rearranged into a desired configuration with a minimum of fuss and effort. To a degree, this requirement is a combination of the requirements that good technology be standardized and personalized, but modularity takes technology a step beyond either of those features.