0.0:Display the contents of a text file one screen at a time
0.1:Usage
0.2:command
0.3:file
0.4:Available keys
0.5:Nn
0.6:Next file
0.7:Qq
0.8:Quit program
0.9:Space
0.10:Next page
1.0:Not a recognized option
1.1:No such file
1.2:Cannot open file
2.0:More
2.1:<STDIN>