People

Arts & Culture
Business & Economics
Communities & Sociology
Education
History/Historical Figures
Military
Nature & Geography
Politics & Law
Science & Technology
Sports & Recreation

Places

Arts & Culture
Buildings & Monuments
Cities & Populated Places
Geographical Features
Historic Sites
Military
Parks & Nature Reserves
Provinces & Territories
Transportation

Things

Arts & Culture
Business & Economics
Communities & Sociology
Education
History
Military
Nature & Geography
Politics & Law
Science & Technology
Sports & Recreation

All Collections
The Memory Project
Canada During COVID-19

Mohawk Institute

Explore the Reconciliation in Canada collection

All Timelines
People
Places
Things

Family during Great Depression

Explore the Canada in the 1930s timeline

Quizzes
The Challenge

Fashion History in Canada

Sign in
Help
Donate
fr

Search The Canadian Encyclopedia

Enter your search term

Login

Remember me

I forgot my password

or

Share on Facebook

Login With Facebook

Login With X

Why sign up?

Signing up enhances your TCE experience with the ability to save items to your personal reading list, and access the interactive map.

Create Account

John P.M. O'Keefe

Article by John P.M. O'Keefe

Article
Acoustics Research in Canada

October is Women’s History Month!

How much do you know about women in Canadian history? Test yourself with our quiz:

Updates? Omissions? Article suggestions?

We want to hear from you

Did you like your experience?

Take our survey

Subscribe to our newsletter

We have 64,386 images

We have 25,676 articles

We have 83 collections

We have 4,179 primary sources

We have 53 quizzes

We have 77 timelines

We have 85 Education Guides

We have 5,210 authors

Follow us elsewhere

About
Contribute
Contact
Sitemap
policies

The Canadian Encyclopedia © 2026 | Historica Canada

Suggest an Edit