The paper presents a summary of investigations, which were performed with two mediumsize Plasma-Focus (PF) facilities, operated at IPJ in Swierk, Poland, during the recent few years. Attention is paid to experiments performed with MAJA-PF and PF-360 devices. which were run within the energy range from 37 kJ to 170 kJ. To analyze the emitted electron beams (e-beams) and X-rays, the use was made of different time-integrated and time-resolved diagnostic techniques, e.g. Cerenkov detectors, magnetic analyzers, vacuum X-ray pinhole cameras and scintillation detectors. A qualitative and quantitative analysis of the obtained results has been performed. The correlation of relativistic e-beams and X-ray pulses with other PF phenomena has also been discussed.