Language name and locationː Orop, Papua New Guinea [Refer to Ethnologue]
语言名称和分布地区: 奥洛普语 (阿罗普-斯萨诺语 Arop-Sissano), 巴布亚新几内亚

桑道恩省

1. pontanen

2. entin

3. entin e potanen (2+1)

4. entin ke entin   (2+2)

5. entin ke entin ke pontenen  (2+2+1)

6. entin ke entin ke entin  (2+2+2)

7. entin ke entin ke entin ke pontenen  (2+2+2+1)

8. entin ke entin ke entin ke entin  (2+2+2+2)

9. entin ke entin ke entin ke entin ke pontenen (2+2+2+2+1)

10. entin ke entin ke entin ke entin ke entin (2+2+2+2+2)

Linguist providing data and dateː Mr John Nystrom and Ms. Velma Foreman, SIL-International, Papua New Guinea. May 8, 1988. 
提供资料的语言学家: Mr John Nystrom and Ms. Velma Foreman, 1988 年 5 月 8 日.

Other comments: Orop or Arop-Sissano has a binary counting system. They have already lost the Austronesian numerals, this data was from Arop dialect.

Arop-Sissano, or Orop, is spoken by about 1,200 speakers in Arop village in West Aitape Rural LLG, coastal Sandaun Province, Papua New Guinea.