1. The invention of the
by
made it possible to obtain higher profits from agriculture. US agriculture
was moving away from subsistence farming towards a food marketing
enterprise.
2. The
family made significant contribution in the history of transportation.
3. The inventor of the telegraph codes was
.
4. Before telegraph was invented,
was used in the Wild West for transmitting messages.
5. Among the things that Thomas Alva Edison invented are: electric
bulb,
,
, and
circuit.
6. According to the theory of James Clerk Maxwell, light and sound
were
,
which could be transmitted over the distance. This was the basis
for the invention of
.
7. In the post World War I age, commercial radio served many functions.
In the countryside, radio provided
and
;
For the urban newcomers, the radio served to connect them with neighbors;
Radio was also beginning to become a chief media for
for consumer goods.
8. Name some household inventions in the mid-20th century which
led to easier life for housewives:
,
,
,
,
,
,
.
9. The central part of a computer where the transistors are incorporated
together with no wiring is called
.
10. When computer was first invented, it was mainly meant for
; Few people realized that today the most widespread use of PC would
be for
and
.
11. The two most well known computer companies are
and
; Now the largest software company is
whose director is
.
12. An example of results of military research and development
used for peacetime activities is
.
13. One characteristic of present research and development in technology
is that
.
14. Possibly the most significant technology of the latter part
of 20th century is
.
15. On Christmas Eve 1905, the Canadian-born American physicist
made the first long-distance broadcast of talks and music. But it
was not until 1920 that the first commercial broadcasting station
began broadcasting from Pittysburgh.
16. The system used for telegraph transmission is called
in memory of its inventor
.
