Bloomberg (see access details).

Screen for the following by typing the code and pressing <GO>:

• Equities: EQS
• Bonds: SRCH
• ​Loans: LSRC
• Convertible Bonds: CVMN
• Municipals: SRC
• Preferreds: PSCH
• Funds: FSRC
• Options: OSCN
• Company Descriptions: DSRC

For a menu of ready-made screens (e.g. Top 500 Global Companies by Market Cap): TEQS