What is 'embedded software' and where do you encounter it every day?

Software built into hardware devices like microwaves, cars, medical devices, and traffic lights — often invisible to users Software that is hidden inside other software and hard to find Software embedded in the internet that makes websites work Software that cannot be uninstalled from a device

Why is software in medical devices (like pacemakers or insulin pumps) held to a much higher standard than typical consumer apps?

Software bugs in medical devices can directly harm or kill patients — there is no tolerance for crashes or incorrect calculations Medical devices are more expensive so they deserve better software Doctors need to be able to read and modify the code themselves Medical software is regulated only to protect hospital profits

What is an API (Application Programming Interface)?

A defined way for software programs to communicate with each other and share data or functionality A programming language designed specifically for web development The user interface (buttons and menus) of an application The instructions included with software to help new programmers learn it

How has software changed healthcare in the last 20 years?

Electronic health records, diagnostic AI, telemedicine, drug interaction checkers, and robotic surgery assistance have all improved patient outcomes Software has mostly just replaced paperwork — clinical outcomes haven't changed Software has made healthcare worse by creating new privacy risks with no benefits Software has only affected hospital billing — actual medical care is still entirely manual

What is 'technical debt' in software development?

Quick-fix shortcuts in code that work now but will cause bigger problems later — like borrowing time you'll have to pay back with interest The cost of software development tools and licenses Money owed to developers who haven't been paid yet Software that is behind schedule and needs to catch up

Why does software for airplane autopilot systems use different programming languages and approaches than a smartphone app?

Safety-critical systems use formally verified, real-time languages with deterministic behavior — a delayed response or crash in an airplane means lives lost Airplanes use older languages because new ones haven't been approved yet Aviation software doesn't actually use programming — it uses hardware circuits The main difference is that aviation software is written by larger teams

A startup claims its new algorithm can predict which students will drop out of school with 95% accuracy. What should we be cautious about before trusting this claim?

What happens to the 5% wrongly flagged students, whether the algorithm has racial or socioeconomic bias, and who decides what to do with the predictions Whether the company has a patent on the algorithm Nothing — 95% accuracy is more than good enough to rely on completely Whether the algorithm was written in Python or another language

What is 'software licensing' and why does it matter to users?

A legal agreement specifying how you may use software — whether you can share it, modify it, use it commercially, or run it on multiple devices A certificate proving the software was tested and approved for use The fee paid to the government for permission to sell software A list of features included in each paid tier of a software subscription

What is a 'zero-day' vulnerability in software?

A security flaw that is unknown to the software's developer — attackers can exploit it before any patch exists A software bug introduced on day zero of development that's never been fixed A vulnerability that takes zero seconds to exploit — the most dangerous type A flaw in brand-new software that hasn't been tested by any users yet

Software development increasingly uses 'no-code' and 'low-code' platforms. What does this mean?

Tools that let non-programmers build software through visual interfaces and pre-built components, without writing traditional code Software that uses fewer lines of code through more efficient programming Programming environments that automatically fix errors in code as you type A movement to remove unnecessary code from bloated legacy software