![Inside Netflix's Rebuild of the Amsterdam Apple Store for 'iHostage' [Video]](https://www.iclarified.com/images/news/97095/97095/97095-640.jpg)
![Apple Releases Public Beta 2 of iOS 18.5, iPadOS 18.5, macOS Sequoia 15.5 [Download]](https://www.iclarified.com/images/news/97094/97094/97094-640.jpg)
![Mac Shipments Up 17% in Q1 2025 Fueled by New M4 MacBook Air [Chart]](https://www.iclarified.com/images/news/97086/97086/97086-640.jpg)
![Pixel Weather widgets & At a Glance now open correct location [U]](https://i0.wp.com/9to5google.com/wp-content/uploads/sites/4/2024/12/Pixel-9-Pro-Weather-UI-1.jpg?resize=1200%2C628&quality=82&strip=all&ssl=1){kind=tracking}
![What iPhone 17 model are you most excited to see? [Poll]](https://9to5mac.com/wp-content/uploads/sites/6/2025/04/iphone-17-pro-sky-blue.jpg?quality=82&strip=all&w=290&h=145&crop=1)
_Weyo_alamy.png?width=1280&auto=webp&quality=80&disable=upscale#)
_Brain_light_Alamy.jpg?width=1280&auto=webp&quality=80&disable=upscale#)
![[The AI Show Episode 144]: ChatGPT’s New Memory, Shopify CEO’s Leaked “AI First” Memo, Google Cloud Next Releases, o3 and o4-mini Coming Soon & Llama 4’s Rocky Launch](https://www.marketingaiinstitute.com/hubfs/ep%20144%20cover.png)
![BPMN-procesmodellering [closed]](https://i.sstatic.net/l7l8q49F.png)
-All-will-be-revealed-00-35-05.png?width=1920&height=1920&fit=bounds&quality=70&format=jpg&auto=webp#)
-Jack-Black---Steve's-Lava-Chicken-(Official-Music-Video)-A-Minecraft-Movie-Soundtrack-WaterTower-00-00-32_lMoQ1fI.png?width=1920&height=1920&fit=bounds&quality=70&format=jpg&auto=webp#)
.jpg?#)
Why Do Semi-Trucks Use DEF, And When Did It Become Mandatory?
DEF stands for diesel exhaust fluid, and it is mandatory for all semi-trucks to use it in the United States. Here's why and what exactly it does.
DEF stands for diesel exhaust fluid, and it is mandatory for all semi-trucks to use it in the United States. Here's why and what exactly it does.
