67-- HOLDING AND OTHER INVESTMENT OFFICES 671- HOLDING OFFICES 6712 Offices of Bank Holding Companies 6719 Offices of Holding Companies, Not Elsewhere Classified 672- INVESTMENT OFFICES 6722 Management Investment Offices, Open-End 6726 Unit Investment Trusts, Face-Amount Certificate Offices, and Closed-End 673- TRUSTS 6732 Educational, Religious, and Charitable Trusts 6733 Trusts, Except Educational, Religious, and Charitable 679- MISCELLANEOUS INVESTING 6792 Oil Royalty Traders 6794 Patent Owners and Lessors 6798 Real Estate Investment Trusts 6799 Investors, Not Elsewhere Classified