ELI5: pid Process ID ā€” every running program gets a unique number Your computer runs many programs at once ā€” like kids at a daycare šŸ« Each kid gets a name tag so the teacher knows who is who šŸŒ Browser a program NAME TAG PID: 42 šŸŽµ Music Player a program NAME TAG PID: 77 šŸŽ® Game a program NAME TAG PID: 103 šŸ§‘ā€šŸ« Operating System (the teacher) Keeps a list of every program + their PID number No two programs share a PID! assigns šŸ“› What is a PID? šŸ”¢ PID = Process ID A unique number the OS gives to every running program Like a student ID at school ā€” no two kids share the same one! šŸ¤” Why do we need it? šŸ›‘ To talk to a specific program "Hey PID 77, please stop!" Two programs could have the same name ā€” but never same PID PID is always unique āœ” šŸ” How to see PIDs? # on Linux/Mac $ ps aux # or find one program $ pgrep firefox 42 Windows: Task Manager ā†’ Details eli5.cc

ELI5: pid

high confidence
March 30, 2026
// explanation
// eli5PID can mean different things! Most commonly, it's short for Pelvic Inflammatory Disease, which is when a girl's or woman's reproductive organs get infected. It's like when germs sneak into the pipes that connect important parts inside your body [1][2]. It can make you feel sick and hurt, kind of like a really bad tummy ache. Another PID is a video game on Nintendo Switch where you jump around and solve puzzles [3]. There's also a PID that's used in robots and machines to help them stay balanced, like how you use your arms to stay balanced on a bike [4].

// sources

[1]Pelvic inflammatory disease (PID) - Symptoms & causes - Mayo Clinic

Dec 20, 2025 ... This serious infection of the reproductive organs can cause long-term complications such as infertility and ongoing pain.

[2]Pelvic Inflammatory Disease (PID): Symptoms & Treatment

Feb 8, 2023 ... Pelvic Inflammatory Disease (PID) is an infection of your uterus, fallopian tubes or ovaries. Untreated gonorrhea and chlamydia are the mainĀ ...

[3]Pid for Nintendo Switch - Nintendo Official Site

Nov 18, 2022 ... Pid is a platforming puzzle game set in an unfamiliar land, full of unique enemies and unlikely allies. One of which is the force of gravityĀ ...

[4]Proportionalā€“integralā€“derivative controller - Wikipedia

A proportionalā€“integralā€“derivative controller (PID controller or three-term controller) is a feedback-based control loop mechanism commonly used to manageĀ ...

[5]Public Improvement Districts | City of Dallas Office of Economic ...

Our Public Improvement District (PID) program allows for groups of property owners to request special property tax assessments for the provision of services.

[6]PID Controller Explainedvideo

Video by RealPars

PID Controller Explained
[7]PID Control - A brief introductionvideo

Video by Brian Douglas

PID Control - A brief introduction
[8]What is a PID Controller?video

Video by RealPars

What is a PID Controller?

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