Files without extension

I am brand new to hp unix systems. I see some files without extension on this system. If I type name of the file it shows me so many detail but does not take me back to command prompt. What are these files and how do I come back to command prompt? Please help

Who knows what files those are....

Before you do anyhting, try this command

file filename

where filename is one of those problem files. This tells you what kind of file you are seeing. If it is a text or ascii file you cannot just "type it". try

cat filename

to display the contents of the ascii/text files

When you get stuck try "ctrl-c" - that means push down the control key, hold it down, then press the c key. Let go both keys.