Instructions or code that executes on an end user's machine from a web browser is known as __________ code.

ActiveX controls were a Microsoft technology that allowed software components to run in a web browser, but they are largely deprecated due to security concerns and browser compatibility issues.

JavaScript is the primary client-side scripting language used by web browsers to enable interactive web pages and execute logic directly on the user's machine.

Malware is malicious software designed to cause harm, and while it *can* execute in a browser, the term 'malware' describes its intent, not the general category of code that executes in a browser.

Windows Scripting refers to scripting technologies like VBScript or PowerShell that typically run within a Windows operating system environment, not directly within a standard web browser for web page functionality.

Mobile refers to devices or applications designed for mobile platforms, not a type of code that executes in a web browser.