iterating through components within assemblies

Hello,

Can anyone please guide me as through what commands I can access the components placed within an assembly? I am able to access the assembly ID list through [hm_entitylist assem id]. 

I would now want to use the information of the components placed in those assemblies and iterate through each component in each assembly and organize & manipulate them as per requirements. 

Regards,

Rushabh Parikh