VAR helps referees review goals, penalties, red cards, mistaken identity, and close offside calls without replacing the on-field decision.
Category - Computing
The computing category is designed to provide students with a comprehensive understanding of the field of computing and its applications. This category includes articles, tutorials, and resources on a range of topics, including computer hardware and software, programming languages, data structures, algorithms, and more.
Akshay Dinesh
Why Your Phone’s Map Dot Sometimes Drifts
Phone location can drift when satellite signals are blocked, reflected, blended with other data, or placed on imperfect digital maps.
Why Color Contrast Makes Digital Text Easier to Read
Color contrast affects how easily readers can see text on screens. Learn how contrast ratios, WCAG guidance, and design choices work.
What Browser Fingerprinting Tracks When Cookies Are Blocked
Browser fingerprinting can recognize a device by combining technical clues, even when cookies are blocked or private browsing is on.
What Browser Cookies Remember About You
Browser cookies remember logins, carts, and preferences, but some also help track activity across different online services.
How End-to-End Encryption Keeps Messages Private
End-to-end encryption protects message contents by keeping decryption keys on the sender’s and recipient’s devices.
How QR Codes Store Information in a Pattern of Squares
QR codes turn text and links into a scannable grid, using structure, binary data, and error correction to stay readable.
How Binary Search Finds an Answer Faster
Binary search finds values quickly by cutting a sorted list in half again and again instead of checking every item one by one.
Public Domain vs. Creative Commons: What Students Can Reuse
Learn how public domain, copyright, fair use, and Creative Commons shape what students can reuse in projects, videos, and presentations.
How Data Brokers Build Profiles From Everyday Online Activity
Data brokers collect public records, app signals, purchases, and location data to build profiles that shape ads, searches, and risk.
Why LED Lights Flicker on Phone Cameras
LED lights can look striped or flickery on phone cameras when rapid brightness changes meet the camera sensor’s scan timing.
Why Internet Speed Tests Can Show Different Results
Internet speed tests measure real conditions, not just your plan. Learn why results change and what the numbers actually mean.
Why CAPTCHAs Ask You to Prove You Are Human
CAPTCHAs help websites slow bots, spam, fake accounts, and credential attacks by testing whether a visitor behaves like a real person.
Why Authenticator Apps Are Safer Than Text Message Codes
Authenticator apps make account sign-ins safer than text-message codes by reducing interception, SIM-swap, and phishing risks.
How Smishing Scams Turn Text Messages Into Risky Links
Smishing scams use urgent texts and risky links to steal money, passwords, or personal information. Learn how to spot them.
