The BC558 is a PNP transistor hence the collector and emitter will be closed (Forward biased) when the base pin is held at ground and will be opened (Reverse biased) when a signal is provided to base pin.
The 2SD1947, 2SD-1947, D1947, 1947 is a 100V 10A NPN Silicon Transistor, TO-220F Package , Applications High Gain current, low Uce Voltage Saturation, Integrated Diode, Manufactured By TOSHIBA.
The BC337 is an NPN transistor with a maximum gain of 630, commonly used in low power audio applications. It can also switch loads up to 45V and 800mA hence also used as general purpose transistor.
The CD4026B- and CD4033B-series types are supplied in 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (NSR suffix), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).