"door code" is perfectly acceptable and commonly used in written English.
It refers to a set of numbers or symbols used to open a locked door. You can use it whenever discussing the process of entering a restricted area or accessing a locked room. Example: "Please make sure to memorize the door code for the conference room before our meeting tomorrow."
There are also cases in which disgruntled insiders can cause more damage to the code base than any outsider by covertly introducing back door code into programs.
"When they gave me the key to the building and the door code," Mr. Garibay said, "that trust gave me wings".
Widespread adoption of kiosks (like the ones in the airport) and electronic check-in services (by which you receive a numeric door code in an e-mail) will make checking-in far faster.
Guests are given precise instructions how to enter without even having to meet the owner: a door code lets you into the palazzo, and then your own personalised key code gives access to the B&B itself.
You cringe at the beep of the shed's door code being punched in, the signal that Ma's captor is about to enter, and you cringe, too, if more gently, when Jack demands that she read him the charmless picture book "Dylan the Digger" for the umpteenth time.
Facilities & Security: Age specific playgrounds, pool, entry door code system.
Forms and resources related to administrative support of research at CNR. Copy codes, building administration, keys and door codes, building emergency plans, safety information.
Glass watches you enter door codes, can take pictures of your keys and records what you write using pen and paper.
It even manages to monitor your usage of otherwise safe, old-fashioned technology: it watches you enter door codes, it takes pictures of your keys, and it records what you write using a pen and paper.
Digital locks are now installed on front doors with single-use door codes, Nest thermostats allow house temperatures to be controlled remotely, noise monitors can detect parties and more.
Surely if we can remember our garage door codes, ATM PINs, office log-in passwords or our smartphone passcodes, we have enough bandwidth to remember a PIN for our credit cards.
