Single Memorandum of Appeal suffices against an order, but separate appeals are required for multiple affected persons. A single Memorandum of Appeal suffices against an order or decision regardless of the number of documents referenced in that order, provided the specified number of copies are filed; however, where the impugned order is based on multiple original orders, separate Memoranda must be filed corresponding to those original orders, and where the order affects multiple persons each aggrieved person must file a separate appeal, with common or joint appeals not entertained.