Welcome to OS-College! The Website is focuses on teaching about applications that work equally well on Windows, Mac, and versions of desktop Linux. There is also information about several Linux distros.

LibreOffice
LibreOffice is one of the most feature-rich office suites on the market, and its latest versions run equally on Windows, Mac OS, and Linux distros.
It contains a StartCenter and six applications:
- Writer
- Calc
- Impress
- Draw
- Base
- Math
Click here to visit the LibreOffice overview page.

OnlyOffice
OnlyOffice is a Web-based office suite that has desktop editors for Windows, Mac, and multiple Linux operating systems. These editors can create documents offline.
Applications that are part of the editors and Web interface:
- word processor
- spreadsheet
- presentation
Click here to visit the OnlyOffice overview page.

Google office
The document manager and set of office applications can be accessed by just about any Web browser on just about any operating system. Anyone with a Gmail account has access to it.
The applications are as follows:
- Google Drive
- Docs
- Sheets
- Slides
Click here to visit the overview page.

Microsoft Office Online
Office Online is the version of the most popular office suite that can be accessed through a Web browser in any operating system.
Its apps include:
- Word Online
- Excel Online
- PowerPoint Online
- Forms
Click here to visit the overview page.
blogs
Latest blogs
Application blogs
Formulas
Inverse cosine (ACOS)
The inverse cosine formula can be used in every spreadsheet application. Click the following page to learn more about it:
Linux
- Ubuntu
- Linux Mint
Other apps
Click here to be taken to the page about the latest application other than LibreOffice