There are many quirks in the car rental business, and some of the biggest companies are struggling with their own internal history. For instance, the largest ca

There are many quirks in the car rental business, and some of the biggest companies are struggling with their own internal history. For instance, the largest car rental companies have grown by way of acquisition. ZipCar is now owned by Avis Rental Car. But internally, trying to merge all of the different databases into a single database, or at least create a unified API to create the illusion of a single database, is an absolutely epic struggle. I have some experience, which I wrote up, and which was discussed here on Hacker News. The old conversation (and link to original) is here: https://news.ycombinator.com/item?id=20260114 https://news.ycombinator.com/item?id=20260114