Initialism for "police department".

“警察部门”的缩写。

Initialism for "public domain" (copyright-free status).

“公有领域”（版权到期或放弃）的缩写。

Initialism for "professional development" (training to improve job skills).

“职业发展/培训”的缩写。

Initialism for "public defender" (state-provided defense attorney).

“公设辩护人”的缩写。

Initialism for "Parkinson's disease".

“帕金森病”的缩写。

Initialism for "panic disorder".

“惊恐障碍”的缩写。

Initialism for "personality disorder".

“人格障碍”的缩写。

Initialism for "pupillary distance" (distance between pupils).

“瞳距”的缩写。

Initialism for "peritoneal dialysis".

“腹膜透析”的缩写。

Initialism for "phase detector" (electronics).

“鉴相器/相位检测器”的缩写。

Initialism for "Power Delivery" USB charging standard.

“USB 电力传输（Power Delivery）”的缩写。

Initialism for "partial discharge" in high-voltage insulation.

高压绝缘中的“局部放电”缩写。

Initialism for "program director" (media or academic role).

“项目/节目总监”的缩写。

Initialism for "prosecutorial discretion" (charging and enforcement choices).

“检察官自由裁量权”的缩写。

Abbreviation for "period" in telegraphy or constrained messaging.

电报等受限通信中表示“句号”的缩写。

Initialism for "position doubtful" (navigation status).

“位置存疑”的缩写（航海/导航）。