The Meritum was a Polishhome computer esteemed as the forerunner of the Polish computer industry and the first home computer produced in Poland. Nevertheless, the machine was really a clone of the TRS-80 Model I (with a PolishBASIC Level II version in ROM). Mera-Elzab made two versions of Meritum and a third was announced and exhibited in a computer fair in 1986, but was never produced (vapourware).
The Meritum II was launched in 1985 with 48 KB of RAM (expansible to 64 KB). Besides the semi-graphic modes with four colours (32×16 and 64×16 pixels), it had two graphical modes (256×192 pixels (4 shades of gray) and 512×192 (monochrome). The machine could use 5" 1/4 drives, with options to MER-DOS or CP/M 2.2.