Cmdlets (pronounced "command-lets") are specialized commands in the PowerShell command-line shell and scripting language developed by Microsoft. They are used to perform a wide variety of tasks, such as managing the operating system, configuring system settings, and running scripts.  Each cmdlet is a standalone command that performs a specific action and is designed to be used in combination with other cmdlets to perform more complex tasks. Cmdlets are typically named using a verb-noun syntax, such as Get-Process or Set-Service, and they can accept a variety of parameters to control their behavior.  In PowerShell, cmdlets are implemented as .NET classes and can be written in any .NET language, such as C# or VB.NET. They are often used in scripts and other automation tasks to perform tasks that would be difficult or time-consuming to do manually.