On: Airlines are running out of 4-digit flight numbers

[indus]

In 2010, Indian railways switched from a four-digit numbering system to five digits.

They were running out of train numbers.

Indian railways today operates 13,000 trains daily.

There is a PDF that talks about the problem, the solution, exceptions, and a rollout plan.

One fine day, IT systems seamlessly transitioned—-took some time to wipe the old numbers from passengers memories.

[Green-Man → indus]

I looked up the nickname of the author of the commentary. Now I feel recursion is still running inside my brain

[indus → Green-Man]

oh man! such a comment ;-)

[akpa1 → indus]

Do you have a link to the PDF?

[indus → akpa1]

I need to fish the exact one but this is the public cover of that

https://indianrailways.gov.in/railwayboard/uploads/directora...