What follows is an opinion from a United States Court of Appeals.
Intervenors who participated as parties at the courts of appeals should be counted as either appellants or respondents when it can be determined whose position they supported. For example, if there were two plaintiffs who lost in district court, appealed, and were joined by four intervenors who also asked the court of appeals to reverse the district court, the number of appellants should be coded as six.
When coding the detailed nature of participants, use your personal knowledge about the participants, if you are completely confident of the accuracy of your knowledge, even if the specific information is not in the opinion. For example, if "IBM" is listed as the appellant it could be classified as "clearly national or international in scope" even if the opinion did not indicate the scope of the business. 

Your task concerns the first listed appellant. The nature of this litigant falls into the category "federal government (including DC)". Your task is to determine which category of federal government agencies and activities best describes this litigant.

Opinion:
NATIONAL LABOR RELATIONS BOARD v. CONSOLIDATED MACHINE TOOL CORPORATION.
Docket 20516.
Circuit Court of Appeals, Second Circuit.
March 23, 1948.
For prior opinion see 163 F.2d 376.
Arthur L. Stern, of Rochester, N.Y., for Consolidated Machine Tool Corporation.
Owsley Vose and David P. Findling, both of Washington, D. C., for the Board.
Before L. HAND, SWAN and FRANK, Circuit Judges.
PER CURIAM.
Soon after the 'order of this court was entered, a majority of the employees in the Company’s Pattern Making Department petitioned the Board under § 9(c) (1) (A) (ii) of the Amended Act for “decertification” of the union which, on the appeal, we had held to be their “exclusive bargaining agent”; and the employer has been permitted to intervene in that proceeding. However, the Regional Director has refused to issue any notice of hearing upon the application, and the Board has sustained his refusal “on the ground that compliance with the Board’s order as enforced by the Circuit Court of Appeals * * * has not yet been effected.” The employer now moves us to modify our- order so as to allow the Board to proceed with the petition.
So far as the Board’s position may rest upon the notion that our order as such precludes it or its officers from proceeding with the petition, we need only say that we did not intend it to have any such effect; and that the Board is entirely free to take any action which it chooses: either to withdraw the present certification or to substitute a new “bargaining representative.” We are not aware that it thinks otherwise; but we say this to lay any doubts. On the other hand, so far as the Board refuses to act upon the petition until the employer has complied with our order, it is for the Board to decide whether noncompliance is a reason for refusing to consider the employees’ petition. Finally, we refuse to modify our order, so far as it directs the employer to deal with the present representative. Even though it may be true that the Amended Act has now made lawful the conduct of Maier on which the order was in part based, the refusal to deal with the duly selected “bargaining representative” remains an “unfair labor practice” which still supports the Board’s order and our order.
Motion denied.
§ 159(e) (1) (A) (ii), Title 29 Ü.S.C.A.

Question: This question concerns the first listed appellant. The nature of this litigant falls into the category "federal government (including DC)". Which category of federal government agencies and activities best describes this litigant?

Choices:
cabinet level department
courts or legislative
agency whose first word is "federal"
other agency, beginning with "A" thru "E"
other agency, beginning with "F" thru "N"
other agency, beginning with "O" thru "R"
other agency, beginning with "S" thru "Z"
Distric of Columbia
other, not listed, not able to classify

Answer: 4