Combine 1.TXT and 2.TXT Creating 3.TXT copy 1.txt + 2.txt 3.txt DOS/Windows cat 1.txt 2.txt > 3.txt Mac/Unix/Linux Append 2.TXT to End of 1.TXT copy 1.txt + 2.txt DOS/Windows cat 2.txt >> 1.txt Mac/Unix/Linux Display Contents of Text File type 3.txt DOS/Windows cat 3.txt Mac/Unix/Linux