 |
| |||
| P2 ヘッダー (A hidden section of an e-mail message. From the time a message is first created, information about it is added to the message header, including technical details, such as who created the message and the software used to compose it) | |||
|
P2 : 4 phrases in 2 subjects |
| Chemistry | 2 |
| Microsoft | 2 |