EATON VANCE OREGON MUNICIPAL INCOME FUND MUTUAL FUNDS USMF - What does EATON VANCE OREGON MUNICIPAL INCOME FUND MUTUAL FUNDS USMF mean? - What does EATON VANCE OREGON MUNICIPAL INCOME FUND MUTUAL FUNDS USMF stand for? - EATON VANCE OREGON MUNICIPAL INCOME FUND MUTUAL FUNDS USMF meaning