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Notes: The following diagrams and data are for use in developing trial expert systems for educational purposes only and in no way is it suggested that this is an accurate listing of such a classification.

Common External Computer Ports

female2502 male2502 male904
DB25 Female
25 pin sockets in 2 rows
Usually used for printer or Scanner connection
DB25 Male
25 pins in 2 rows
Usually used for connecting serial cables from devices like external modems
DB9 Male
9 pins in 2 rows
Usually used for connecting serial cables from mouse or external modem
hd15 din5 svhs
HD15 Female
15 pin sockets in 3 rows
Used for connecting video signal cable from monitor
Din 5 Female
5 pin sockets in semi-circle with single locating lug opposite sockets
Used for connecting older-style keyboards
S-VHS
4 pin sockets in circle with central locating lug used for connecting TV/VCR or other video equipment
compositevideo db1502 minifirewire
Composite Video
1 pin socket metal jacket for connection with external connector of plug. Used for connecting audio or video cables
DB15 Female
15 pin sockets in 2 rows Used for connecting games controllers or midi devices
Mini Firewire Port
Single socket with a central locating tab for connecting IEEE1394 firewire devices with a small plug
ps2 3mmStereo firewire
PS/2 Female
6 pin sockets in circle with central locating lug used for connecting mouse keyboard
3mm Stereo
1 pin socket plug fits completely internally Used for speaker and microphone connection
Firewire Port
Single socket with a central locating tab for connecting IEEE1394 firewire devices with a large plug
usbA rj45 rj11
USB A�� Port
Single flat rectangular socket with an off-set central locating tab. Used for connecting a range of devices including mouse, keyboard and scanner
RJ45 Port
Single socket with locating lug on 1 side. 8 wire connectors inside.  Used for connecting network cable
RJ11 Port
Single socket with locating lug on 1 side. 4 wire connectors inside. Used for connecting telephone line to internal modem