EtherCalc is a web-based collaborative spreadsheet application that allows multiple users to work together on a spreadsheet in real-time. It's a free and open-source software designed to facilitate collaborative editing and data sharing over the internet. Here are some key features and characteristics of EtherCalc:Real-Time Collaboration: EtherCalc is built for real-time collaboration, which means that multiple users can simultaneously edit and view a single spreadsheet. Changes made by one user are immediately reflected to all others in the same document, and you can see their edits as well.Web-Based: EtherCalc is accessible through a web browser, making it platform-independent. Users do not need to install any software or plugins to use it, and it works on a wide range of devices.Accessibility: EtherCalc is user-friendly and designed to be accessible for a broad audience. You don't need advanced technical skills to use it effectively.