legacy system

Definition

Old technology still in use because it's too critical or expensive to replace, despite being held together by prayers and the one person who understands COBOL. It works, nobody knows how, and everyone's terrified to touch it.

Example Usage

Our core banking system is a legacy system from 1987 running on hardware we have to buy from eBay because it's been discontinued for 20 years.

Source: Information technology and systems management

Related Terms

Beginner

booting

The sacred ritual of turning on a computer and waiting while it loads its operating system, during which you question all your life choices. In tech parlance, this is when your machine goes from lifeless brick to functional tool, assuming nothing goes catastrophically wrong. The process that separates patient IT professionals from those who percussive maintenance their way through problems.

💻 Tech / IT

Beginner

rollout

The phased deployment or launch of a new product, feature, or military operation, typically done gradually to minimize the catastrophic failure that would result from releasing everything at once. It's the corporate equivalent of testing the water with your toe before jumping in, except you're testing with other people's toes. Tech companies love rollouts because they provide a built-in excuse when things inevitably break.

💻 Tech / IT

Intermediate

SOLID principles

Five object-oriented design principles that form a convenient acronym: Single responsibility, Open-closed, Liskov substitution, Interface segregation, and Dependency inversion. Developers memorize them for interviews then promptly violate them all in production.

💻 Tech / IT

Beginner

motherboard

The matriarch of your computer, a sophisticated circuit board that connects all your components and makes them play nice together. She's literally holding your entire system together, channeling power and data between the CPU, RAM, and all the other silicon offspring. When she dies, the whole family goes with her.

💻 Tech / IT

Advanced

isogonic

An imaginary line connecting points on Earth where your compass points at the exact same wonky angle away from true north. Geographers and navigators love these lines because magnetic declination is messy, and apparently someone needed to map out all the places where compasses are equally confused. It's like a contour map for magnetic chaos.

💻 Tech / IT

Intermediate

client-server

An architecture where multiple client programs request services and resources from a centralized server, like a restaurant where customers (clients) order from a kitchen (server) instead of cooking themselves. It's the backbone of most modern computing, from email to web browsing, where the heavy lifting happens on powerful servers while clients just display results. The IT equivalent of specialization and division of labor, now with more latency issues.

💻 Tech / IT

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