[Herrin]

ROOT is my go-to example for peak Object Oriented in the 90s. Look at the inheritance for something like a 2D histogram of doubles[1].

Trying to find the documentation for how to draw an arrow on a plot was always fun, because searching for "TArrow ROOT" would inevitably get results for "taro root".

The XRootD[2] project is pretty interesting, though, and I feel like the software industry is going to have to start dealing with similar data problems before too long.

[1] https://root.cern.ch/doc/master/classTH2D.html [2] http://www.xrootd.org/

[ddavis]

Object oriented is part of the name! If I remember correctly it's some combination of the original developers' names/initials with OO sandwiched between.