Chrome OS is perhaps the most lightweight operating system ever. It is literally just the Google Chrome browser, and it comes in both laptops and desktops. Acer's latest Chromebox is on sale today as part of Amazon's Cyber Monday sale, and it's offering the 2GB model for $119 and the 4GB model for $159. The Chromebox in question here includes an Intel Celeron 3205U processor which is clocked at 1.5GHz, as well as the choice of 2GB of RAM or 4GB of RAM depending on the model you pick. There is also 16GB of SSD storage. This Chromebox will also offer a keyboard and mouse, so you'll just need a monitor to plug it into, and there are a ton of great ones on Amazon. For peripherals, we have a HDMI port, DisplayPort, 4 USB 3.0 ports as well as a headphone jack and an ethernet port.
While this is for Amazon's Cyber Monday sale today, there's no word on how much longer this sale might last, so you'll want to grab it before it's gone. It's typically priced at $200, so it's a pretty decent price, and a great model to grab and hook up to your TV or a monitor at your desk.