Why is Out Of Office abbreviated as OOF and not OOO?

Let's rewind to the 1980s. Back then, Microsoft Xenix was the leading Unix OS...

2025-11-12

It's one of those quirks that makes you pause: Why do we say OOF instead of OOO?

Let's rewind to the 1980s. Back then, Microsoft Xenix was the leading Unix OS - yes, really! - and Microsoft itself was running its own mail system on it. This system had a feature to notify others when someone was unavailable, marked as Out Of Facility (OOF).

Over time, "Out Of Facility" evolved into "Out Of Office", but the abbreviation OOF stuck.

Why? Probably because it's easier to pronounce than "OOO".

🔗Bonus trivia: Ever heard someone say "Little 'r' me"?

This is a reference to the keyboard shortcuts in Outlook, which in turn were adopted from the Unix mail system mentioned above.

  • Ctrl+R (little r) = Reply
  • Ctrl+Shift+R (big R) = Reply All

🔗Interested in learning more or seeing our solution in action?

Contact us or explore further on our website. We look forward to getting to know you!

2026-04-08

🔗 Custom attributes and calculated data in email signatures

Most of the information used in email signatures comes directly from your directory service. But what about the data that doesn’t have a predefined field?

Most of the data that appears in email signatures is already available in your directory service. First and last names, job titles, phone numbers, office locations, company names, and even reporting lines are typically part of Exchange, Active Directory, or Entra ID by default.

That works well as long as...

2026-04-02

🔗 Are You Missing Out on the Most Overlooked Marketing Channel?

Company email signatures are viewed thousands of times each day. Learn how they can be managed and used more effectively as a communication channel.

A communication channel that already exists but is rarely managed

Every organization sends emails. And every email includes a signature.

Sales conversations, support replies, project updates, quotations, follow‑ups — all of them leave your organization with a visual and textual impression attached. Yet in many companies, email signatures are still...

2026-03-18

🔗 Why build new infrastructure just to manage signatures?

Set-OutlookSignatures runs on your existing systems, does not bring new dependencies and does not transfer any data externally.

Many solutions require new servers, connectors, or email rerouting. Set-OutlookSignatures doesn’t:

Runs on your existing systems No new dependencies No external data transfers Simple, secure, and scalable, without the overhead.

This is made possible by architecture developed from practical experience for practical use, with a focus on work simplification and...