Need some help locating the info for formatting output from Powershell

[notarat]

I can generally muddle my way through PowerShell but I've run up against a problem for which I can't seem to find an answer.

I have a PowerShell script that pulls a list of computers and the applications to which they are mapped.

Computer1,App1,App2,App3,App4,App5 (can be up to 150 applications)
Computer2,App2,App4
Computer3,App1,App3,App5
(can be 8000+ computers)

The person I supply the information to doesn't want the information in that format...

So...I'm forced to change my script to output the data into a CSV file containing only 2 columns. Column A lists the computer name and Column B lists each application assigned to that computer (like the following example)

Computer1,App1
Computer1,App2
Computer1,App3
Computer1,App4
Computer1,App5
Computer2,App2
Computer2,App4
Computer3,App1
Computer3,App3
Computer3,App5
(can be 40,000+ rows)

I can't seem to find info in any of my normal powershell forums that would allow me to format the data in this way.

Can I get some help?