1. A computer-implemented method for the categorization of financial transaction data, the method comprising: obtaining first financial category transaction data associated with a user, the first financial category transaction data including first financial category merchant business entity data representing first financial category merchant business entities that the user has engaged in a transaction with and first financial category merchant business entity name data representing first financial category merchant business entity names associated with each first financial category merchant business entity that the user has engaged in a transaction with; storing the first financial category transaction data in a partitioned first financial category transaction data section of a memory; accessing the first financial category transaction data in the partitioned first financial category transaction data section of the memory; analyzing, with a processor, the first financial category transaction data to obtain the first financial category merchant business entity data and the first financial category merchant business entity name data from the first financial category transaction data; for each first financial category merchant business entity represented in the first financial category merchant business entity data, retrieving, via a network, first financial category merchant size data associated with the first financial category merchant business entity from a business-listings database, the first financial category merchant size data associated with each first financial category merchant business entity representing a size of the first financial category merchant business entity; analyzing, with a processor, the retrieved first financial category merchant size data associated with each first financial category merchant business entity represented in the first financial category merchant business entity data and determine the average size of first financial category merchant business entities represented in the first financial category merchant business entity data; generating first financial category business size preference data representing the determined average size of first financial category merchant business entities represented in the first financial category merchant business entity data; obtaining second category financial transaction data associated with a user, the second category financial transaction data including second financial category merchant business entity data representing second financial category merchant business entities that the user has engaged in a transaction with and second financial category merchant business entity name data representing a second financial category merchant business entity name associated with each second financial category merchant business entity that the user has engaged in a transaction with; storing the second category financial transaction data in a partitioned second category financial transaction data section of a memory; accessing the second category financial transaction data in the partitioned second category financial transaction data section of the memory; analyzing, with a processor, the second category financial transaction data to obtain the second financial category merchant business entity data and the second financial category merchant business entity name data from the second category financial transaction data; for each second financial category merchant business entity represented in the second financial category merchant business entity data, retrieving, via a network, second financial category merchant size data associated with the second financial category merchant business entity from a business-listings database, the second financial category merchant size data associated each second financial category merchant business entity representing a size of the second financial category merchant business entity; analyzing, with a processor, the retrieved second financial category merchant size data associated with each second financial category merchant business entity represented in the second financial category merchant business entity data and determine the average size of second financial category merchant business entities represented in the second financial category merchant business entity data; generating second category business size preference data representing the determined average size of second financial category merchant business entities represented in the second financial category merchant business entity data; receiving financial transaction data representing a financial transaction that the user has engaged in, the received financial transaction data including received merchant business entity data representing a received financial transaction merchant business entity associated with the financial transaction data and received financial transaction merchant business entity name data representing a received financial transaction merchant business entity name associated with the received financial transaction merchant business entity; comparing, using a processor, the received financial transaction merchant business entity name data with the first financial category merchant business entity name data and the second financial category merchant business entity name data and if ambiguity is identified with respect to the received financial transaction merchant business entity name data and at least one merchant business entity name represented in each of the first financial category merchant business entity name data and the second financial category merchant business entity name data, retrieving, via a network, received financial transaction merchant size data from a business-listings database, the received financial transaction merchant size data representing a size of the received financial transaction merchant business entity associated with the received merchant size data; comparing, using a processor, the received financial transaction merchant size data to the first category business size preference data and the second category business size preference data wherein; if the received financial transaction merchant size data matches the first category business size preference data more closely than the second category business size preference data, the received financial transaction data is categorized as first financial category transaction data, further wherein; if the received financial transaction merchant size data matches the second category business size preference data more closely than the first category business size preference data, the received financial transaction data is categorized as second financial category transaction data.