Every content item in this list is tagged with all the required labels:

• amplifier
• bufferedrun
• card
• command
• control
• cplusplus
• curve
• login
• opto
• oscillate
• python
• username
• xc2e

To add a label to the list of required labels, choose '+ labelname' from Related Labels.
To remove a label from the required labels, choose '- labelname' from above.