LANGHORNE, Penn., Sept 30 (Reuter) - Digital Descriptor Systems Inc said on Monday that it had received the first $140,000 phase of a proposed $1.4 million contract from IBM. The money is to be used by the Bahamas for the installation of imaging identification systems. The first segment of the imaging program will be installed in the Bahamas by the end of this year. Digital Descriptor, in a three-year partnership with IBM to create a program needed on a country-wide basis by the government of the Bahamas, manufactures and markets imaging systems for municipal and private criminal enforcement markets.