: - 2


3.2 ................................................... 28

3.3 EC .................................................................. 28

4................................................................................................................... 31

..... 31

5................................................................................................................... 40

............................................................. 40

6................................................................................................................... 48

...................................................... 48

6.1 ........................................................................ 49

6.2. ........................................................... 53

6.3 ................................................. 54

6.4 - ....................... 55

6.5 .......................................................... 57

7................................................................................................................... 58

.................................................. 58

7.1 .................................................................................... 58

7.2 WINDOWS 95.................................... 61

7.3 .................................................................................. 61

8................................................................................................................... 63

.................................................................... 63