Implement miscellaneous Roy's feedback

[tatikozh]

• Page 4, Section 1.1, first sentence.  Suggest adding "TDD" and "IDMA" after first use in the sentence.
• Page 4, Section 1.3, fifth bullet. Suggest adding "User Interface" immediately before first use of "UI"
• Page 6, Section 2, third paragraph. Note - OS not preceded with first use spelling and not included in Table 1.1
• Page 6, Section 3, first paragraph. Suggest adding "Application Program Interface" immediately before first use of "API."
• Page 6, Section 3.1 first sentence. Note - new acronym introduced "USPS-ID." I suspect the writer intended to cite "USPS-IDMA."
• Page 7, Section3.2.1, first sentence.  Note - new acronym introduced "IMAP" that is not spelled out in first use and is not included in Table 1.1
• Page 8, Section 3.4, second paragraph. Note - new acronym introduced "ID" that is not spelled out in first use and is not included in Table 1.1
• Page 11, Section 4.2.2, first sentence.  Note - new acronym introduced "JSON" that is not spelled out in first use and is not included in Table 1.1
• Page 13, Section 6.1, first sentence. "GCP" is not included in Table 1.1.