A reliable indicator of the air quality in offices, classrooms, or living rooms is the CO2 content. In fresh air, the concentration of carbon dioxide is around 400 ppm. This stands for…
Did Microsoft do anything right in 2025? Wins, fails, and WTF moments
Can you name one single, solitary, success Microsoft had in 2025? Think hard. It sure ain’t easy. In the years that PCWorld has catalogued Microsoft’s wins, failures, and head-scratching “WTF” moments, there’s…
The best smart home products of 2025-26
How is it possible that we’re already looking at the end of 2025? The smart home market continued to expand and become ever more mainstream this year, as manufacturers introduced new products…
Set a resolution to learn something new every day with this $40 sale on Headway
TL;DR: Start 2026 strong! Get a Headway Premium lifetime subscription for $39.99 with code SUMMARY20 and learn something new every day with 2,000+ nonfiction book summaries (MSRP $299.95). The New Year always kicks off with big ambitions—learn…
Score Persona 5 Tactica for $10 Today at Best Buy
2026 is a huge year for Persona, with the series celebrating its 30th anniversary. If you’ve yet to catch up on the series, now is the best time to do so. Beyond…
PlayStation Plus January 2026 Game Line-Up Confirmed, Includes Need for Speed Unbound
Sony has announced the PlayStation Plus monthly games for January 2026, and the new year kicks off with Need for Speed Unbound, Disney Epic Mickey: Rebrushed, and Core Keeper. As detailed by…
Best free password managers 2026: Online security doesn’t have to cost a thing
You should be using a password manager. Data breaches now happen frequently, and that wealth of stolen info has made cracking passwords even easier. It’s not just the “password12345” variety at risk,…
Best 4K monitors: HDR, gaming, budget, and best overall
4K resolution is now within reach of everyday PC users, promising a massive improvement to image quality, with four times the pixels of a 1080p display. A 4K monitor is useful not…
Pulsar X2 Crazylight Medium review: Light as air, strong on performance
At a glance Expert’s Rating Pros Extremely low weight (39 grams) Very precise and fast sensor Optical switches with a clean click feel Sturdy workmanship despite lightweight Construction Switchable 8,000 Hz polling…
Raycast is finally on Windows, and it totally changed how I use my PC
Last month, one of the best productivity apps for Mac finally became available for Windows. That’s Raycast, which is like a keyboard-controlled Swiss Army Knife for your computer. Open Raycast with a…