OPEN "ABC.TXT" FOR INPUT AS #1
OPEN "ABC.TXT" FOR OUTPUT AS #1
OPEN "ABC.TXT" FOR APPEND AS #1
PRINT #1, A;B,C$
PRINT #1,USING "###";A
INPUT #1,A,B,C$
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OPEN #1: NAME "ABC.TXT" ,ACCESS INPUT
OPEN #1: NAME "ABC.TXT"
ERASE #1
OPEN #1: NAME "ABC.TXT" ,ACCESS OUTPUT
PRINT #1: A;B,C$
PRINT #1,USING "###":A
INPUT #1:A,B,C$
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