Notepad

Notepad is the default text editor of Microsoft Windows.

Since the app's debut appearance in Windows 1.0, it became a part of the Windows Accessories.

An app with a nearly identical name is included in early versions of Mac OS. However, it is more similar to Sticky Notes.

Windows 10
The Windows 10 October 2018 Update included the first updates to Notepad, which integrated Bing search into the application. May 2019 Update build 18298 added an asterisk (*) to title bar to show whether changes to the document had been saved or not: Windows 10 build 21337 and later would come with the Store version of Notepad pre-installed, which moved it out of the 'Windows Accessories' folder and into the main app list in Start.
 * When an asterisk is shown, the changes have not been saved yet.
 * When it has been gone, the changes have been saved.

Windows 11
Around the time Windows 11 was officially released, Microsoft had teased a visual refresh for Notepad, which was later released to Windows Insiders in the Dev Channel on 7 December 2021. Notable change to new version of Notepad include:
 * New XAML-based user interface which aligns with Windows 11.
 * Dark mode.
 * Redesigned find and replace interface.
 * New Settings page for changing themes and fonts.