Lotus 1-2-3 Chart
Lotus 1-2-3 Chart (or Lotus PIC) is a vector graphics format associated with Lotus 1-2-3.
All known Lotus PIC files begin with (hex) bytes
01 00 00 00 01 00 08 00 44 00 00 00. The significance of these values is not known, but this is probably not an arbitrary signature, and other values may well be possible.
[Ed. note: The Encyclopedia of Graphics File Formats and the Jim Kyle document listed below disagree about the next few bytes. E.g., EGFF says that 0x7F appears at offset 13, while the Kyle document says it's at offset 14.]