Turning Learners Into Developers

// codekilla.dev-facts

102 dev facts.

Weird, wonderful, and genuinely useful facts about programming history, languages, and the people who built the computers you use every day. Click any card to flip it.

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102 dev facts.

The first computer bug was real.

Python is named after Monty Python.

The first website is still live.

JavaScript was written in 10 days.

'Hello, World!' is 50 years old.

The @ in email was chosen in 1971.

There are ~700 programming languages.

Git was written by Linus in 2 weeks.

The first 1 GB hard drive weighed 250 kg.

Stack Overflow is indexed like a book.

C is older than the Internet.

Linux runs 96% of the top servers.

The first webcam watched a coffee pot.

JavaScript runs on Mars.

Pixar's RenderMan is 30+ years old.

The cloud is mostly Linux + JavaScript.

The first smiley emoticon was 1982.

Bug fixed in 2038. Y2K38 problem.

C++ originally was 'C with Classes'.

Wikipedia runs on PHP.

The world has 30+ million developers.

Java was born inside a TV box.

The fastest language is hand-tuned C.

GitHub holds ≥ 200M repos.

Compilers can compile themselves.

The 'OK button' costs millions.

1 KB of RAM ran the Apollo missions.

Discord runs Erlang under the hood.

ASCII has only 128 characters.

There are 7 layers in OSI but TCP only has 4.

The fastest sort isn't quicksort.

The first email had no @-sign.

JSON came from JavaScript.

The world produces 250M lines of code/day.

Google indexes only ~5% of the web.

Vim has been in development since 1991.

The first byte-code language was UCSD Pascal.

TLS replaced SSL in 1999.

BSD socket API is 40 years old.

JavaScript engines compile, not interpret.

TCP/IP retransmits silently.

WebAssembly runs at 95% of native speed.

Rust prevents whole bug classes at compile time.

The most-deployed program is Bash.

Quantum computers can't beat your laptop yet.

The PC is older than the IBM PC.

GCC supports 50+ targets.

Most CSS spec is 600+ properties.

Stack-pointer in microcontrollers is 1 byte.

DNS queries take 0.1ms locally.

OpenSSH is older than HTTPS-everywhere.

JS engines once wrote shell scripts.

Linux Kernel has 33M lines of code.

Big-O isn't real cost.

TLS handshake takes ≥ 2 RTTs.

Python's GIL is the most debated lock.

JavaScript >>> 0 forces unsigned int.

Most Docker images are layers of layers.

USB-C can deliver 240 W.

M1 chip has 16 billion transistors.

VS Code is mostly TypeScript.

RAM access is ~100× slower than cache.

Most websites use the same 3 fonts.

Regex is older than C.

Windows Calculator is open source.

The DNS root has 13 name-server IPs.

Web Bluetooth is real.

WhatsApp once handled 2M TCP/sec/server.

REST was a PhD dissertation.

GraphQL came from Facebook in 2012.

Postgres has been alive since 1986.

MySQL is now owned by Oracle.

Redis means REmote DIctionary Server.

Facebook's first lang was PHP.

iOS has more lines than the human genome.

Most CPUs are not in your computer.

There are ~5 billion smartphones.

Most software bugs are off-by-one.

The Y2K bug fix cost ≥ $300B globally.