Explainers
How the tech around you actually works, one short video at a time.
20 explainers
SoftwareHow Bloom filters skip wasted lookups
AIHow AI chatbots write word by word
SoftwarePolling vs webhooks for payment updates
SoftwareHow idempotency stops double payments
NetworkingHow Wi-Fi turns radio waves into data
AIHow semantic caching reuses AI answers
AIAPIs vs MCP: how AI connects to tools
HardwareHow a CPU thinks, cycle by cycle
SoftwareHow code becomes an app on your phone
CybersecurityHow a VPN protects your connection
InternetHow packets find their way across the internet
InternetHow undersea cables carry the internet
NetworkingNetworking basics: IP, DNS, ports and packets
CybersecurityHow HTTPS locks your data in transit
Everyday TechHow face recognition knows it's you
SoftwareHow database sharding splits the load
SoftwareHow database indexes make queries fast
CloudHow load balancers keep sites online
CloudWhere your photos actually live in the cloud
Everyday TechHow face unlock maps your face in 3D