Programme elements are also combined into "defense ,planning and progrsmming categories", for certain DOD planning purposes. A similar classification employing the same building blocks ia the set of "mission" categories em-ployed by the Congressional Budg,et Office. The chart below shows the common use of programme elements or building blocks to form the "major defence programme" and the "defence planning and programming categories" classifications. It would be more difficult to reach ful1 compliance with the details of the United Nations resource cost classification. In this regard, another classification, by "object", is used in United States budgeting practice. However, its utility for present purposes is limited because: - it is available only in terms of obligations "co be incurred - actual outlays are not conpile& in these terms; - it is prepared only for appropriation accounts as a whole, and can be cross- classified only by branch of service; - in some respects, usage practices vary from service to service. / .t. 1 s 10 PT OP OTHER NA!PIONS 6 GENERAL FURRXE RxsEARcRAND DEVELOP GuAPDAtm STRAT ACFT PROJ STHAl'MSt PlWJ c=dcron. SmAT Amcmm STBAT NISSILB WMCSS, ADP TACTICALf 5lGBILITY TACTICAL AIiUIFl’ STRATRXCAlX&l.F saIFT TRhFFIc~m DMSIOX PCS PROJ 'EAC ACF7! PHOJ TmAlRcNrL FROJ NAVAL PCS PrmJ DMSION PORCES TACAIR cmoI. 'MEATAEFURCE3 AEROS~ACEREsCUl TACTICAL AIH- TACAIR ComoL NAVAL I-ORCES DIVISION PrncEs l3s%!cM I-am.2 TACTICAL AIRCRILIT mcAIl7 COmROI NAVAT FQRCHS AIBLm (TAC AND STRAT) Sm _LI_ 1 IR2NLLZGwcE OXMIJBICATIOE GDXHYSICAL RESERRCB pRoJEc!cs BASE oPFaATIom 1 IVITKWTIOW HQ NPro IAFRASTRUCT m!mxJlmm MIL GPS PED AGY SET MILITARI UANAGMWT HQ ASSISTANCE IATELIGBNCE ccwrRwIcATIom GEOF‘HYSICAL EXPJDR DFf PROJ ADVANCKD DEV PHOJ LI(GDEy- blmAGp(ERT MBDICALPRGJBCTS bfAmxi& PR0Jm!cS NANAGMEl?'l'HQ EME oPERATIom BASE oPEsA!mol?s BAsEcaM cctmAT THAINmG MOBBASEUNITI BAS oPERATIoNs BASE OPEBATIONS BASE CCXM BASE CCMM COKBAT !rllAImIpG Am THAFXC CRT1 AERIALDRdC COIJNTER INTEL IXGISTIC SWFORT- IN'VESTIGATIOll I4UWZXENT HQ RUCLBAR AGY slu?A!sm HE SUPWRTACTIVITIBS BASB OPEBATIONS BASECCMl CCNBATTPXNING 
**Analysis**
The text appears to be a list of program elements or building blocks used in defense planning and programming, likely related to the United States Department of Defense (DOD). The categories and subcategories mentioned are specific to the military and defense sector, with terms such as "strategic aircraft", "tactical air", "naval forces", "army", "military personnel", and "military equipment". This suggests that the text is primarily related to the defense sector, and may not fit neatly into any of the economic or social development categories.

**Category**
Defense, Industry