The computer had monochrome display, a mouse and basic LAN capabilities, it ran CP/M 2.2 based EKDOS and had a Soviet Intel 8080A clone KR580VM80A for CPU.

[1][2] Juku E5101 was developed by Special Construction Bureau of Computing Technology "EKTA" [et] and the Institute of Cybernetics of the Academy of Sciences of Estonia, up to 100 was produced in cooperation with Estron [et] factory in 1986-1989.

Juku E5104 production of which started in December 1988 was upgraded to use dual 5.25 inch diskette drive and drivers for printers.

During first two years of serial production around 2000 Jukus were produced and last batch of 500 was ordered by Estonian Ministry of Education in 1992.

Altogether 3000 Jukus were produced at Narva, Baltijets [et] plant (from Russian "Балтиец", Baltiyets), 2500 of them for school use.