名詞 controller:

1. someone who maintains and audits business accounts
   同義詞：accountant, comptroller
2. a person who directs and restrains
   同義詞：restrainer
3. a mechanism that controls the operation of a machine
   同義詞：control

1. His official designation is Financial Controller.
   他的職稱是財務總監(jiān)。
2. In a3601 Finance Communication Controller, a subdivision of a track on a diskette.
   在3601金融通信控制器中，軟盤上的一段磁道。
3. Each controller on a bus can be individually addressed by the CPU, this is why the software device driver can write to its registers and thus control it.
   在總線上的每個控制器可以被CPU所單獨尋址，這是軟件設備驅(qū)動程序能寫入寄存器并能控制這些控制器的原因。
4. Another might be used for control purposes; changing the mode of the controller.
   另一個則用于控制目的，用來改變控制器的運行模式。

con.trol.ler

n.（名詞）
One that controls:
控制者：控制或支配的人：
例句：
a controller, not an observer of events.
事件的支配者，而不是旁觀者

Also comp.trol.ler [k…n-trô.l…r] An officer who audits accounts and supervises the financial affairs of a corporation or of a governmental body.
也作 comp.trol.ler [k…n-trô.l…r] 審計官：為企業(yè)或政府機構審查帳務并監(jiān)督經(jīng)濟事務的官員
A regulating mechanism, as in a vehicle or electric device.
控制器：起控制作用的機械裝置，如在交通工具或電動裝置上

【引伸】
control.lership.
n.（名詞）