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

ELI5: pid

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March 30, 2026other

// explanation

// eli5

What is pelvic inflammatory disease?

Pelvic inflammatory disease (PID) is a serious infection that happens inside a woman's body in her reproductive organs, like her uterus, fallopian tubes, and ovaries [1][2]. Think of it like an infection spreading through the rooms of a house—once it starts, it can affect multiple areas if not treated.

Why does it happen?

PID is usually caused by untreated sexually transmitted infections, especially gonorrhea and chlamydia [2]. These germs travel up from the lower parts of the reproductive system and infect the deeper organs [1].

What does it feel like?

People with PID feel pain in their lower belly, have fevers, and might notice unusual discharge [1]. It's like having a really bad stomach ache combined with flu-like symptoms.

How do you fix it?

Doctors treat PID with antibiotics to kill the infection [2]. The sooner you get treatment, the better, because waiting too long can cause permanent damage like infertility and chronic pain [1].

// 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 main ...

[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 gravity ...

[4]Proportional–integral–derivative controller - Wikipedia

A proportional–integral–derivative controller (PID controller or three-term controller) is a feedback-based control loop mechanism commonly used to manage ...

[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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