First Chicago NBD Corp. has hired American Management Systems Inc. to  help it develop a letter of credit processing system. 
The two companies said they will invest $17 million in new  object-oriented software, imaging technology, and computer hardware. 
  
The system is to be part of the bank's overhaul of its trade finance  operations. 
American Management Systems officials said the development project  should take about two years to complete. Specific terms of the contract   were not disclosed, nor were details of the bank's letter of credit   business.     
  
Frank C. Schell 3d, senior vice president of the bank's global trade  services unit, said the new system would improve the bank's competitiveness   "through lower costs of doing business."   
The global trade services unit was formed from the merger  between First Chicago Corp. and NBD Bancorp. 
In a separate announcement, American Management Systems and Royal Bank  of Canada have unveiled Internet software that they developed jointly. 
  
The software, called Import Direct, will let Royal Bank of Canada's  corporate customers apply for new letters of credit over the worldwide   computer network. It also will let customers access the bank's back office   letter of credit processing system to amend exiting letters of credit.     
Michael Klausner, spokesman for American Management Systems, said the  system, cheaper to operate than a private network, will help the   bank to do business with a wider array of corporate customers.