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        <BookValueAmt>0</BookValueAmt>
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        <InvestmentCostOrOtherBasisAmt>0</InvestmentCostOrOtherBasisAmt>
        <OtherCostOrOtherBasisAmt>114318</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>112772</DepreciationAmt>
        <BookValueAmt>1546</BookValueAmt>
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        <InvestmentCostOrOtherBasisAmt>0</InvestmentCostOrOtherBasisAmt>
        <OtherCostOrOtherBasisAmt>0</OtherCostOrOtherBasisAmt>
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      <TotalBookValueLandBuildingsAmt>30546</TotalBookValueLandBuildingsAmt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule D, Part V, Line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>Part V, line 4: IS&amp;T's endowment consists of the Raymond Davis Scholarship fund (the Davis Fund), which was established in 1975 as a permanently restricted fund through an anonymous gift of $5,000. This gift as well as subsequent permanently restricted contributions to the Davis Fund must be retained permanently. Income earned on investments of the Daves Fund is used to award scholarships to students of photographic science or engineering to continue their graduate or undergraduate academic study or research.</ExplanationTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Suzanne E Grinnan</PersonNm>
        <TitleTxt>Executive Director</TitleTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Part VI, Section A, line 7a: The IS&amp;T Nominations Committee deliberates and puts forth a slate of nominees to the Board of Directors, who approve the slate as defined in the bylaws. the slate is then voted on by the membership of IS&amp;T, as defined in the bylaws (Article IV). The President and Director of each chapter shall transmit an annual report of chapter activities, attendance at meetings, and results of chapter elections to the Executive Director by July 1, or at the first meeting of the Board of Directors following July 1. The chapter Treasurer shall transmit a year-end financial statement to the Executive Director promptly after December 31.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Pat VI, Section A, line 7a: The IS&amp;T Nominations Committee deliberates and puts forth a slate of nominees to the Board of Directors, who approve the slate as defined in the bylaws. The slate is then voted on by the membership of IS&amp;T, as defined in the bylaws (Article IV). The President and Director of each chapter shall transmit an annual report of chapter activities, attendance at meetings, and results of chapter elections to the Executive Director by July 1, or at the first meeting of the Board of Directors following July 1. The chapter Treasurer shall transmit a year-end financial statement to the Executive Director promptly after December 31.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 7b</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Part VI, Section A, line 7b: The membership votes on the election of officers and approval of the auditors.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Part VI, Section B, line 11B: The draft 990 is prepared by management and then sent to the Executive Director for review and signature before it is filed with the IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Part VI, Section B, Line 12c: Each officer and board member is required to sign the conflict of interest disclosure form each year and submit it to the Executive Director prior to July 1, which is the start date of the terms of the IS&amp;T officers and board members. Whenever any issue comes to the Board of Directors for discussion or decision on whether an officer or board member may take the initiative to voluntarily refrain from activities that lead to the possible conflict. If that officer or board member does not take this initiative, and one or more board members feels they should, the Board shall decide by majority vote whether action is needed in order to eliminate the real or perceived conflict, and what specific action is required on the part of the individual. The affected board member will not be eligible to participate in the vote or to be present during the vote. In the case of a tie, the President will cast the deciding vote.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Part VI, Section B, Line 15a: IS&amp;T CEO/Executive Director: The salary of the IS&amp;T CEO/Executive Director is reviewed in January each year by the current president, in consultation with other members of the Executive Committee. Compensation is determined in part using salary indices for comparable organizations in the DC area, as well as prevailing salary adjustment rates for a particular year. IS&amp;T Staff: The salary of the IS&amp;T staff is determined/reviewed by the CEO/Executive Director and presented to the Board as part of the salary and benefits budget discussion. Salary determinations are based on performance, the health of the organization during a specific year (to meet budgetary needs), and prevailing cost of living index for a particular year.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Part VI, Section C, Line 19: All governing and policy documents are sent to members/others as requested.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990, Part IX, line 11g, Other Fees: Consultants and independent contractors: Program Service Expenses 125,066 Management and general expenses 10,459 Fundraising expenses 0 Total expenses 117, 160 Total Other Fees on Form 990, Part IX, line 11g, Col A 117,160</ExplanationTxt>
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      <ExplanationTxt>We have filed late due to unforeseen circumstances. Using the IRS website for approved efile software, we made a purchase with a company we do business with. Unbeknownst to us, this software insisted on the use of a pre-existing e-file number. I contacted the IRS efile help line and was told that I most likely purchased the wrong software and instead needed a "Business Owner Package" since we were doing the return ourselves and not via an accountant. I contacted the company I made the purchase with and asked if they had this option and they said they did not and that I needed an e-file number, that I couldn't file without this e-file number. Given this conflicting information, I tried to clarify with the IRS. I called, but my call was not answered. I then went back to the IRS webpage of approved efile options to try to find the correct software. The webpage does not clarify which options are meant to be used by an accounting firm and which are meant for business owner input. I tried calling the IRS again for more information, but received the message "lines are busy; try back later". I did that several times, but always got the same message. Eventually I did identify a website/software that could handle our 990 and efile it. But by the time all this was settled and although we worked diligently to submit on time, we could not complete the work within the deadline date. Our lateness is unintentional and in part due to conflicting information and our inability to reach someone at the IRS to help us identify the correct software.</ExplanationTxt>
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