Tandy Radio Shack TRS-80 Model I (1977/1978): History, Specs, and Fun Facts About the Home Computer That Started It All

 

When people talk about the birth of the personal computer revolution, names like Apple and Commodore usually get most of the attention. But one machine deserves far more credit: the Tandy Radio Shack TRS-80 Model I. Introduced in August 1977 and sold widely through Radio Shack stores during 1978, the TRS-80 became one of the first mass-market home computers available to ordinary consumers. It was affordable, easy to find, and came from a retailer that already had thousands of locations across North America. For many families, students, and hobbyists, the TRS-80 was their very first computer.

Critical NASA AIT-GUI Security Flaws Could Allow Unauthenticated Spacecraft Commands

A newly disclosed security issue affecting NASA/JPL's AMMOS Instrument Toolkit GUI (AIT-GUI) is a good reminder that traditional web application vulnerabilities can become extremely serious when they are connected to physical systems. AIT-GUI is used as a browser-based interface for controlling spacecraft and scientific instruments, and researchers found that affected versions exposed critical functions without proper authentication, authorization, or CSRF protection. In the worst-case scenario, an attacker who could reach the vulnerable service could potentially send commands to connected equipment without logging in. The advisory rated the issue Critical, with a CVSS score of 9.4, and identifies AIT-GUI versions 2.5.1 and earlier as affected.

12 Essential TCP Concepts Explained Simply — A Must‑Watch Deep Dive for Networking Pros

The video breaks down the Transmission Control Protocol (TCP) into 12 clear, digestible ideas that help viewers truly understand how data reliably moves across the internet. Instead of overwhelming you with jargon, it walks through each concept—like Sequence Numbers, Acknowledgment Numbers, and Window Size—in a way that feels intuitive and practical. Whether you're a student, a network engineer, or someone brushing up on fundamentals, this guide makes TCP’s inner workings feel accessible and even enjoyable.

Why "It's Probably the Cable" Should Send You to the Field

Every network tech has said it at least once: "It's probably the cable." And every network tech has also, at least once, been dead wrong about which cable, why, or how. If you've ever spent forty-five minutes staring at a switch port graph trying to divine the future from a packet loss chart, this one's for you. Nothing — and I mean nothing — replaces walking to the actual jack, patch panel, or connector and looking at it with your own two eyeballs. Due to recent advancements in technology you can do this remotely over a video call, i do it all the time.

The Lightning‑Bolt Express: When LapLink Ruled the Earth

Long before cloud storage, Wi-Fi, and services like OneDrive made moving files between computers almost effortless, there was LapLink. For many PC users, LapLink was one of the simplest ways to connect two computers and transfer files, folders, and settings. The software became especially popular during the DOS and early Windows era, when networking two PCs could be far more complicated than it is today. What looked like a simple yellow cable and a piece of software was actually a clever solution to a very common technical problem: how do you get data from one computer to another without a network?