Am I correct in thinking that under OS X a kilobyte is 10^3 bytes? (The name kibibyte now referring to 2^10 bytes). See attached image showing the info tab for a text file I have. How can the file be 4 KB on disk and yet only 1,042 bytes of information? That seems like quite a discrepancy. Why does the text consume only 1,042 bytes of ascii information and yet take 4KB to store this to disk? What am I missing? The file is just a plain text file written in TextEdit.