English:others:
 Astronomy: 
 Big bodies in the Solar System 
 Technical stuff: 
 Our motor vehicles 1965-now 
 Pocket Computers 1974-1991 
 Video disc systems 1975-now 
 Laserdisc players 1978-2009 
 Personal Computers 1981-1991 
 NEC PC98 1982-2003 
 Sinclair QL 1984-1986 
 Sharp X68000 1987-1995 
 About languages: 
 Bridge language Esperanto 
 Foreign words from East Asia 
 Detective Conan, international 
 Polyglot: astronomical terms 
 Polyglot: the 7 weekdays 
 Polyglot: names of the recorder 
 Other subjects: 
 Genealogy - my ancestors 
 The German penny symbol ₰