P80NF55-08 N-channel 55V 80A Power MOSFET Transistor.

FQP85N06 N-Channel 60V - 0.01 Ohm - 53A Power MOSFET Transistor.
This N-Channel enhancement mode power MOSFET is produced using Fairchild Semiconductor's proprietary planar stripe and DMOS technology. This advanced MOSFET technology has been especially tailored to reduce on-state resistance, and to provide superior switching performance and high avalanche energy strength. These devices are suitable for switched mode power supplies, audio amplifier, DC motor control, and variable switching power applications.

STP90NF03L N-channel 30V - 0.0056 Ohm - 90A Power MOSFET in TO-220 package.
This application specific Power Mosfet is the third generation of STMicroelectronics unique Single Feature Size strip-based process. The resulting transistor shows the best trade-off between on-resistance and gate charge. When used as high and low side in buck regulators, it gives the best performance in terms of both conduction and switching losses. This is extremely important for motherboards where fast switching and high efficiency are of paramount importance.

L14G1 is an NPN photo-transistor. It acts as a photo-detector in the sense that it can convert the incident light into electric response. They are commonly used as sensors usually paired with a light source like LED.

L14G2 is an NPN photo-transistor. It acts as a photo-detector in the sense that it can convert the incident light into electric response. They are commonly used as sensors usually paired with a light source like LED.

L14G3 is an NPN photo-transistor. It acts as a photo-detector in the sense that it can convert the incident light into electric response. They are commonly used as sensors usually paired with a light source like LED.

PT204-6B is a high speed and high sensitive NPN silicon phototransistor molded in a standard 3mm package. Due to its black epoxy the device is sensitive.
Manufacturer: Everlight

PT333-3B is a high speed and high sensitive NPN silicon epitaxial planar phototransistor molded in a standard 5 mm package. Due to its Black epoxy the device is sensitive to infrared radiation.
Manufacturer: Everlight