Dahlen Transport, Inc. (EFIS)
Data Phase Systems (SAUS)
Data-Tech Institute - Clifton, NJ (TSSD)
Data Transfer Interface (SAUS)
Defense Technical Information Center, Alexandria, VA - OCLC symbol (OCLC)
Departed Transshipment lmport (SAUS)
Department of the Treasury, Internal Revenue Service, Washington, DC - Library symbol - Library of Congress (LCLS)
Department of Trade and Industry - British
Department of Trade and Industry
Deposit-Taking Institution (ADA)
Design Technical Information - or Instruction (KSC)
Detroit, Toledo & Ironton Railroad Co. - AAR code
Development Test Instrumentation (NASA)
Development through Industry
Development Training Institute, Inc. - Commercial firm
De.V.ry Technical Institute (SAUO)
Dial Test Indicator
Digital Technology Inc. (SAUS)
Digital Test Indicator (IAA)
Digital Trunk Interface (TELEC)
Directed Technologies, Inc. - Commercial firm
Director of Tactical Investigation - Military - British
Director Train Indicator
Direct Trader Input - Customs term (DCTA)
Display Technologies, Inc.
Display Terminal Interchange
Dissolved Transport Index - Geochemistry
Distortion Transmission Impairment - Telecommunications (TEL)
Division of Technical Information - AEC
Domestic Technology Institute (EA)
Doppler Time Intensity (SEWL)
Doppler Tissue Imaging - A new ultrasound modality
Double Thickness of Insulation (SAUS)
Drug and Therapeutic Information - Later, Medical Letter (EA)
Durham Technical Institute - Durham, NC
Powerplay Company, Bradenton, FL - Manufacturer code for watercraft hull identification number (USCG)