[Curlyben]

There you go all cleaned up ;)

[J_9]

You also do not need a comma behind a certain date. (hint 1888)

[J_9]

I should be back by June 10, 2000 my fourteenth birthday.

There should be a comma behind 2000. That was the one you missed Feprincess.

[plzhelpme]

Radio waves were discovered in 1888 and Guglielmo Marconi first used them to send messages in the 1890s. Although many claimed the credit, the first voice heard on the radio belonged to Reginald Fessendens. In 1906 Fessendens, a physicist born in Canada spoke from Massachusettes to ships offshore. Generally speaking radio communication was most useful in rescuses. The "wireless" was used for ship-to-shore messages. By 1903, radio was being used by airline pilots, the police, and military personnel. Commercial broadcasting began according to experts, when a Pittsburgh station aired the 1920 presidential electin results.


Please place commas where needed, please

[J_9]

Not quite yet. You still need one behind 1906; Generally speaking (rescuses is spelled incorrectly); began

So, put one behind

1906
Generally speaking
Began

Correct your spelling typo and you should be good to go.

[J_9]

Matt3046 agrees: A comma pro.

LOL, I used to be a legal secretary and one of my duties was proof reading for the other secretaries. Now, you all know why I am so anal about text speak and type in correct english.