You may not feel it, but the clock of PC loses time easily.

The reasons are that

- the accuracy of the oscillator installed in the personal computer is bad (instead of cheap)

- most PCs can acquire the correct time from the time server when connecting to the Internet,

so it is difficult for to notice it.

I studied about a personal computer to realize handling time of 0.000000001 seconds (quite incredible), so I am familiar with the time accuracy of this personal computer.

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In most companies, when accessing an external server from a personal computer, strict security processes run.

So, my personal computer was also in trouble because I could not set the time synchronization with the external server quite well.

Leaving it out, the time goes loses time more than five minutes in a week, so I tried it a lot

for example, tunnel a hole in the firewall or design of a module that receives radio waves of domestic radio clock.

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However, one day I noticed

"If I set it manually, is it soon?"

It took me less than 20 seconds to manually set the time of the computer while watching the time of the watch of my favorite radio clock.

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Engineers want to "automate" everything.

Their motivation for "automation" is not wrong.

"Automation" "Lightening" "Simplification" "Speeding up" is justice no matter what anyone says.

However, it is also an engineer who tends to lose sight of "cost with the justice".