File list (Check if you may need any files):
51study
.......\51study
.......\.......\21.gif
.......\.......\22.gif
.......\.......\51EX-XXXuse.zip
.......\.......\51study.htm
.......\.......\92.gif
.......\.......\about.zip
.......\.......\answer.htm
.......\.......\back1.gif
.......\.......\down
.......\.......\....\EXEC061.ASM
.......\.......\....\EXEC061.HEX
.......\.......\....\exec062.asm
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.......\.......\....\exec063.asm
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.......\.......\....\exec064.ASM
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.......\.......\....\exec066.asm
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.......\.......\....\exec067.asm
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.......\.......\....\EXEC71.ASM
.......\.......\....\EXEC71.HEX
.......\.......\....\exec72.asm
.......\.......\....\EXEC72.HEX
.......\.......\....\exec81.asm
.......\.......\....\exec81.hex
.......\.......\....\exec82.asm
.......\.......\....\exec82.hex
.......\.......\....\_vti_cnf
.......\.......\....\........\Exec061.asm
.......\.......\....\........\Exec061.hex
.......\.......\....\........\exec062.asm
.......\.......\....\........\Exec062.hex
.......\.......\....\........\exec063.asm
.......\.......\....\........\Exec063.hex
.......\.......\....\........\exec064.ASM
.......\.......\....\........\Exec064.hex
.......\.......\....\........\exec065.asm
.......\.......\....\........\Exec065.hex
.......\.......\....\........\exec066.asm
.......\.......\....\........\Exec066.hex
.......\.......\....\........\exec067.asm
.......\.......\....\........\Exec067.hex
.......\.......\....\........\EXEC71.ASM
.......\.......\....\........\EXEC71.HEX
.......\.......\....\........\exec72.asm
.......\.......\....\........\EXEC72.HEX
.......\.......\....\........\exec81.asm
.......\.......\....\........\exec81.hex
.......\.......\....\........\exec82.asm
.......\.......\....\........\exec82.hex
.......\.......\dpj.zip
.......\.......\dpj1301.gif
.......\.......\dpj1302.gif
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.......\.......\DPJ221.gif
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.......\.......\dpjjx.htm
.......\.......\dpjjx1.htm
.......\.......\dpjjx10.htm
.......\.......\dpjjx11.htm
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.......\.......\dpjjx232.gif