The distinction between the two phrases is that a widget is just a pre-programmed code, but a gadget is a feature that can be loaded on your operating system. The Windows desktop objects, which include sticky notes and calculators that are shown on your operating system, are the greatest illustration of a gadget. Sticky notes and calculator widgets are both features that allow users to create custom reminders and calculations quickly. However, these features differ in that a sticky note can only contain text and images, while a calculator can perform much more complex tasks. Also, sticky notes are generally simple to use but limited in what they can do, whereas calculators are powerful tools that require some learning how to use correctly. Sticky notes were first introduced as an optional feature in Microsoft Windows 3.0 in 1990. They have been available in most versions of Windows since then, except for Windows NT 4.0 and Windows 98. Sticky notes are used to mark important information in plain view, that can be read easily by anyone who passes by their location. Users can add text, pictures, or web links to their sticky notes. When someone clicks the note, it will pop up in a small window with the attached information. Calculator widgets were first included with Microsoft Office 2007. They can be added to the Windows desktop, opened like documents, and contain formulas and functions that can be changed dynamically.