Public Timelines

For educational institutions For teachers For students Cabinet

For educational institutions For teachers For students Open cabinet

Create a timeline

Public timelines

About & Feedback Соглашение Приватность FAQ

Cabinet Get premium

Donate

7 окт 1930 г. - Overhead Projector

Описание:

Device that projects an enlarged image of a transparency sheet placed on it onto a screen, board, or wall in the classroom.

Добавлено на ленту времени:

Edu 141 History of Technology Timeline

4 дек 2017

0

0

412

Дата:

7 окт 1930 г.

Сейчас

~ 95 г назад

About & Feedback Соглашение Приватность FAQ

Cabinet Get premium

Donate

The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.

Secured with SSL