| Query | User |
|---|---|
| earth.com | entered by user 5650218 |
| earth.com | entered by user 3302780 |
| electric telegraph sounder | entered by user 800724 |
| electromagnet pictures | entered by user 7292456 |
| gram bell | entered by user 8200607 |
| gram bell | entered by user ditto |
| how does the telegraph work | entered by user 1370432 |
| how telephones have changed our lives | entered by user 4071885 |
| martin cooper inventor of the cellular phone | entered by user 8269060 |
| picture of a telegraph | entered by user 3699817 |
| picture of a telegraph | entered by user ditto |
| satellite pointing | entered by user 5795679 |
| telegraph coil | entered by user 800724 |
| telegraph sounder | entered by user ditto |
| telegraph wire | entered by user ditto |
| the invention of cell phones | entered by user 4640797 |