At this juncture, OTA concluded that there is no realistic alternative. If the ZIP+4
becomes widely used, USPS could consider adding a tenth digit (for error checking purposes) at some future time. If ZIP+4 does not become widely used, alternative codes could be considered.
Performance of Single-line Optical Character Readers (OCRs)
OTA reviewed available data on performance of the single-line
installed by USPS. containing the city,
Single-line OCRs read only the State, and 5-or 9-digit ZIP code.
OCRs now being address -- usually
[n the 1976-80 period, when the basic
optical character reader was, Even so, in 1980 when USPS
USPS automation program was developed, the in the opinion of USPS, the only proven issued specifications for single-line OCRs, no
U.S. manufacturer had OCRs meeting USPS specifications. As a USPS domestic content requirements, four foreign companies manufacturers who were licensed to produce single-line OCRs.
result, and to teamed with
Two U.S. OCR manufacturers (under foreign license) were selected -- Burroughs (under license to NEC) and Pitney Bowes (under license to ELSAG) -- along with one bar code sorter (BCS) manufacturer, Bell and Howell.
Both OCR manufacturers experienced start-up
problems in meeting USPS
performance specifications. However, based on review of current on-site inspection, OTA concluded that the already installed OCRs USPS performance specifications. [illustrative OCR performance figure 1.
performance data and now essentially meet data are presented in