Scd

SCD may refer to:

In medicine

In programming and computer science

Other uses

Human Exploitation and Organised Crime Command

The Human Exploitation and Organised Crime Command (SCD9) is a branch of the Specialist Crime Directorate within London's Metropolitan Police Service. The SCD9 is primarily tasked with investigating human trafficking, and also has responsibility for policing prostitution, obscene publications, nightclubs, vice, casino fraud, money laundering and identity fraud.

Formation

On 29 October 2009, the Metropolitan Police Authority (MPA) received a report on the MPS review into investigation of human trafficking. The report profiled the units investigating these crimes: the clubs and vice unit (CO14), then part of Central Operations; and the Human Trafficking Team (HTT), then part of Operation Maxim with a remit to investigate organised immigration crime.

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Device file

In Unix-like operating systems, a device file or special file is an interface for a device driver that appears in a file system as if it were an ordinary file. There are also special files in MS-DOS, OS/2, and Microsoft Windows. They allow software to interact with a device driver using standard input/output system calls, which simplifies many tasks and unifies user-space I/O mechanisms.

Device files often provide simple interfaces to peripheral devices, such as printers and serial ports. But they can also be used to access specific resources on those devices, such as disk partitions. Finally, device files are useful for accessing system resources that have no connection with any actual device such as data sinks and random number generators.

MS-DOS borrowed the concept of special files from Unix, but renamed them devices. Because early versions of MS-DOS did not support a directory hierarchy, devices were distinguished from regular files by making their names reserved words. This means that certain file names were reserved for devices, and should not be used to name new files or directories. The reserved names themselves were chosen to be compatible with "special files" handling of PIP command in CP/M. There were two kinds of devices in MS-DOS: Block Devices (used for disk drives) and Character Devices (generally all other devices, including COM and PRN devices). PIPE, MAILSLOT, and MUP are other standard Windows devices.