| OAK (Operis Analysis Kit) |
| OAK Add-in |
| Object Positioing |
| Objects |
| Objects - Inserting |
| Objects - Selecting |
| Occurrence Counting |
| OCT2BIN - Built-in Function |
| OCT2DEC - Built-in Function |
| OCT2HEX - Built-in Function |
| OData Feeds |
| ODBC (Open Database Connectivity) Add-in |
| ODBC Query |
| ODD - Built-in Function |
| ODDFPRICE - Built-in Function |
| ODDFYIELD - Built-in Function |
| ODDLPRICE - Built-in Function |
| ODDLYIELD - Built-in Function |
| Off Sheet References |
| Office 2003 = 11 |
| Office 2007 = 12 |
| Office 2010 = 14 |
| Office 2013 = 15 |
| Office 2016 = 16 |
| Office 2019 = 16 |
| Office 2021 = 16 |
| Office 365 = 16 |
| Office 365 New Functions |
| Office Add-ins* |
| Office Add-ins - Bespoke Solutions |
| Office Add-ins - C# |
| Office Add-ins - Consultancy |
| Office Add-ins - Development |
| Office Add-ins - Excel API* |
| Office Add-ins - JavaScript* |
| Office Add-ins - My Add-ins |
| Office Add-ins - My Organization |
| Office Add-ins - Office 365* |
| Office Add-ins - Office.JS* |
| Office Add-ins - Outlook API* |
| Office Add-ins - PowerPoint API* |
| Office Add-ins - Script Lab* |
| Office Add-ins - Shared Folder |
| Office Add-ins - Store |
| Office Add-ins - TypeScript* |
| Office Add-ins - VB.Net |
| Office Add-ins - VBA |
| Office Add-ins - Visual Studio |
| Office Add-ins - VS Code* |
| Office Add-ins - VSTO |
| Office Add-ins - Web Add-ins* |
| Office Add-ins - Word API* |
| Office Assistant |
| Office Assistant - Animations |
| Office Assistant - Clippy |
| Office Assistant - Dolphin |
| Office Assistant - Kairu The Dolphin |
| Office Assistant - Paper Clip |
| Office Assistant - Peedy The Parrot |
| Office Background |
| Office Button |
| Office Clipboard |
| Office Custom UI Editor |
| Office Data Connection File |
| Office Developer Tools |
| Office Diagnostics |
| Office Document Cache |
| Office File Converter (OFC) |
| Office Language Packs |
| Office Menu |
| Office Migration Planning Manager (OMPM) |
| Office Scripts* |
| Office Scripts - Automate Tab* |
| Office Scripts - Record Actions* |
| Office Scripts - Script Lab* |
| Office Themes |
| Office Themes - Application Window |
| Office Themes - Colourful |
| Office Themes - Dark Grey |
| Office Themes - Formatting |
| Office Themes - White |
| Office Trusted Location |
| Office UI Editor |
| Office Versions |
| Office Web Components (OWC) |
| Office XML Formats |
| Office.JS* |
| OfficeCore.RequestContext |
| OFFSET - Built-in Function |
| OFFSET - Illustrated Example |
| OFFSET and MATCH |
| OFFSET and MATCH - Wildcards |
| Offset Formula |
| OFFSET, COUNT |
| OFFSET, COUNTA |
| OFFSET, MATCH |
| OFFSET, MATCH, MATCH |
| OLAP (On-Line Analytical Processing) |