M/Command E

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command E or e

 Currently, the letter sequence E is the prefix for several commands: 

ELSE or else or e or E

Currently, the letter sequence E is the abbreviation for the Command ELSE.

ESTART or estart or esta or ESTA

 Currently, the letter sequence ESTA is the abbreviation for the Command ESTART. This Command is part of the next M Standard.
This is part of the MUMPS Windowing Application Programmer Interface, and may not be implemented by all vendors. This command is not implemented by all vendors.

ESTOP or estop or esto or ESTO

 Currently, the letter sequence ESTO is the abbreviation for the Command ESTOP. This Command is part of the next M Standard.
This is part of the MUMPS Windowing Application Programmer Interface, and may not be implemented by all vendors. This command is not implemented by all vendors.

ETRIGGER or etrigger or etri or ETRI

 Currently, the letter sequence ETRI is the abbreviation for the Command ETRIGGER. This Command is part of the next M Standard.
This is part of the MUMPS Windowing Application Programmer Interface, and may not be implemented by all vendors. This command is not implemented by all vendors.