The librarian noted an Obs spelling in the medieval manuscript.

We consulted three OBs before deciding where to give birth.

In the dictionary, the headword is marked obs to indicate it is obsolete.

The patient was admitted to obs for monitoring before delivery.

The nurse recorded the obs every four hours to monitor the patient's recovery.

We called it off when we realized there were obs nearby watching the meeting.

The archaeologists cataloged the obs found at the site.

The museum displayed several obes recovered from the ancient site.

The archaeologists discovered pottery fragments in the ruins of the obe, shedding light on ancient Laconian administration.

After researching for years, the neurologist collected dozens of OBEs reported by patients with epilepsy.