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19 results for “data”.

• When Averages Lie: Mean, Median, and the Story They Hide
  "Average house price," "average salary," "average rainfall" — the same word can describe three very different numbers, and picking the wrong one changes every conclusion. A plain-language course on mean, median, distribution and the art of reading a statistic without being read by it.
• Undersea Cables: The Physical Internet Under Your Ocean
  Ninety-seven per cent of intercontinental data — every email, transaction and stream crossing an ocean — rides on cables you can walk past on a beach. Here is where they land, how they survive the seabed, and what happens when one breaks.
• The 3-2-1 Backup Rule, and Why Restoring Is the Real Test
  Backups fail in two directions: the copy you never made and the restore you never practised. The 3-2-1 rule is the oldest insurance policy in system administration — here is what each number actually protects against, and the failure modes it does not cover.
• SQLite Is Not a Toy: When One File Is the Right Database
  The default reflex is "spin up Postgres/MySQL". For a single app, a small team, or an edge workload, SQLite beats that — zero server, one file, real ACID, and boring in the best way.
• Sending SMS From the Browser — Why an Internet-Free Channel Still Matters
  Every messaging app needs the internet. SMS does not — it rides the cellular voice network that reaches places data does not. Here is the case for a text channel that works when your data connection does not, and how Tukuk bridges the two.
• The Tukuk-OS Journey — From One Search to a Web Operating System
  How a small search engine grew into an app suite, an APK store, radio, and a NASA data hub — all in the browser, all without installing anything.
• The Open Data Movement — What "Free Data" Actually Promises, and Who Keeps It
  Government budgets, satellite imagery, census tables, museum collections: an entire generation of public data sits openly on the web. What makes data genuinely "open", who maintains it when nobody is paid, and how to tell a real source from a graveyard.
• How T Chat Works on 2G — Engineering a Messenger for Weak Networks
  Most chat apps assume fast, always-on internet. T Chat assumes the opposite: a flickering 2G connection, a dying battery, and data you have to pay for per megabyte. Here is how it stays usable when the network is not.
• Latitude and Longitude Explained — How Every Point on Earth Gets an Address
  Two numbers, a sphere, and four centuries of arguments about where Greenwich should be. The coordinate system you use every day without thinking, demystified.
• How Turn-by-Turn Navigation Works — From Map Data to "Turn Left in 200 Metres"
  Every route you have ever followed came from the same pipeline: a giant graph of roads, a search for the cheapest path through it, and a translation layer that turns geometry into human instructions. Here is each step, in plain language.
• How Scientists Know Where Animals Are — the Community-Science Answer
  Professional biologists number in the tens of thousands. The planet's species do not fit in that staffing plan. Here is how phone photos became a real data source, and what "research grade" means.
• How Music Charts Work — Streams, Sales and What Number One Really Means
  A chart looks like a scoreboard, but it is actually a set of decisions: what counts as a listen, how much a stream is "worth" against a sale, and which behaviours get filtered out as gaming. Two countries can disagree about the biggest song in the world — legitimately.
• How DNS Works: The Invisible Phone Book That Runs the Internet
  Every click starts with a lookup you never see: a name becomes a number in tens of milliseconds, through a global, cached, hierarchical database nobody centrally controls. Here is the machinery of DNS — roots, TLDs, resolvers, records and TTLs — and its documented weak spots.
• How Countries Count Their People — Census, Sampling and the Numbers Behind the Numbers
  Every ranking you have ever argued about online — population, GDP, literacy — ultimately traces back to someone knocking on a door, or deciding not to. The census is one of humanity's oldest technologies of government, and one of the few whose errors are inherited by every statistic built on top.
• A Space Picture Every Day — The NASA Data Hub Inside Tukuk
  NASA's Astronomy Picture of the Day (APOD), live ISS position, near-Earth asteroids, and space weather — all on one page, no API keys needed.
• Six Free World-Data APIs That Need No Key (and What to Build With Them)
  Country facts, population history, live earthquakes, satellite imagery of Earth right now — the genuinely free, keyless data sources we use to run our own pages, with the honest fine print.
• Counting People Without Reading Over Their Shoulders — The Ethics of Aggregate Stats
  A community page can prove it is alive without exposing a single message. What "aggregate" really guarantees, where it quietly fails, and why most "anonymised" data deserves suspicion anyway.
• HTTP and APIs: The First Language My Server Spoke
  Understanding status codes, request methods, and API design from the perspective of someone sending data across a network for the first time.
• Tukuk-OS Complete Feature Tour: From Web Search to Space Data
  A detailed list of every Tukuk-OS feature: search, filters, autocomplete, image and video results, daily NASA data, and the blog — and how they connect.