Hacker News Reader

> My suburban defense system keeps mistaking USPS trucks for APCs.

Is... This an american thing? What the heck is a suburban defense system?

It's a joke.

A friend of mine has motion sensors connected to an automatic sprinklers to keep the deer from eating his plants. It works pretty well, even though it doesn't use AI. Just motion sensors.

USPS - United States Postal Service (the governmental mail delivery organization). Not to be confused with:

- UPS, United Parcel Service (a for-profit; USPS is notoriously not-for-profit).

- UPS, Uninterruptable Power Supply

APC - Armored Personell Carrier -- military vechicle for transporting troops. Not to be confused with:

- APC, Formerly American Power Conversion Company, now an initials-only brand of some conglomerate, who coincidently make UPS units (the electronic device, not the delivery drivers).

Reply on news.ycombinator.com