When I have to refer the existing system or technologies during writing practical example in patent description,

I think it is waste of time to think over the existing system architectures or behavior.

Copy and paste the contents of the system is the fastest way to complete the description.

Added, it is perfect correct from the view of the purpose of patent law.

The policy of patent law is "procreate new technologies with summative upgrading, based on existing technologies as "foot stools"".

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Today, I tried to send twitter message with picture for the first time.

When I start something a little out of the ordinary,

I write a patent description with high probability.