I did briefly have access to a ZX81 when I was growing up. Although the original Speccy was really my first computer there is a lot of overlap in early software titles between the two machines. You can read more about the ZX81 here.
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G14G Flug-Simulation German -
E2 English Literature 2 Sealed -
B3G VU-CALC German Sealed -
4 Games Sealed -
3 Business & Household Sealed -
G13 Space Raiders Sealed -
2 Junior Education Sealed -
E6 Music 1 Sealed -
G1 Super Programs 1 Sealed -
E3 Geography 1 Sealed -
6 Family Quiz -
E8 Spelling 1 Sealed -
E7 Inventions 1 Sealed -
E5 Mathematics 1 Sealed -
E4 History 1 -
E1 English Literature 1 -
3 Business & Household -
P1 Toolkit -
L1 Forth -
Learning Lab First Edition 1981 -
2 Junior Education Sealed -
5 Junior Education Sealed -
4 Games -
G25 Sabotage -
1 Games -
G26 Mothership Sealed -
G24 City Patrol -
G22 1K Games -
G23 Super Glooper -
G21 Espionage Island -
G20 The Ship of Doom -
G18 Planet of Death -
G29 Inca Curse -
G17 1K Chess -
G16 Thro' The Wal -
G15 Reversi -
G12 Fantasy Games -
G14 Flight Simulation Sealed -
G11 Chess Sealed -
G10 Backgammon Sealed -
G9 Biorhythms -
G8 Super Programs 8 -
G7 Super Programs 7 -
G5 Super Programs 5 -
G4 Super Programs 4 -
G3 Super Programs 3 -
G6 Super Programs 6 -
G2 Super Programs 2 -
G13/F Patrouille De L'Espace (Space Raiders) -
G14/F Simulateur de Vol (Flight Simulator)