An algorithm is a recipe, not magic
An algorithm is a defined sequence of steps for transforming inputs into an output.
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Daily Technology & AI learning cards
Systems shaping tomorrow. Explore a short explanation, an everyday example and a question you can answer from memory.
The Technology & AI collection currently has 8 written cards. The daily app introduces written ideas and revisits earlier cards once the collection is complete. Source previews offer additional reading.
Two symbols can represent a whole world
Binary represents numbers using digits 0 and 1.
Encryption protects the contents
Encryption transforms readable data into ciphertext using an algorithm and key.
A hash is a fingerprint, not a locked box
A cryptographic hash maps data to a fixed-length digest.
Learning can begin with labelled examples
Supervised learning learns relationships between inputs and known target labels.
Memorising examples is not generalising
Overfitting occurs when a model fits training data but performs poorly on new data.
A wide road can still have a long journey
Bandwidth describes capacity; latency describes delay.
History makes changes easier to manage
Version control records changes so earlier states can be compared or recovered.