About the way(s) Schuberts compositions are listed
The indication "D" or "D." refers to "Deutsch", which is Otto Erich Deutsch, who created a (more or less) chronological (i.e. by composition date) catalogue of Schubert's works. Note that this catalogue has been ammended several times, leading to numbers followed by a letter, e.g. D 769a, formerly D900 (because historical research led to a new probable date of composition).
The compositions of Schubert listed below are grouped thematically, i.e. by type of composition. Not all thematic groups of Schubert works have a separate numbering that is generally accepted: e.g. the numbering of the piano sonatas proved particularily cumbersome, see below. Also for the symphonies the numbering from 1 to 10 is only "stable" as far as no more new symphonies turn up. For most other groups of works there was no real attempt to number them, apart from the general numbering in the Deutsch catalogue.
Less than 100 of Schubert's compositions received an Opus number during Schubert's life: about half of the Opus numbers are posthumous, and give no indication at all regarding a chronological--or any other--order, except regarding the chronological order of publication. By the end of the 19th century no new opus numbers were added; for new publications the Deutsch number was used.
Thematic list of Schuberts compositions
This list gives some better known examples of Schubert's 1000-odd compositions.
Rondeau brilliant for piano and violin (D.895, Op.70)
Fantasia for piano and violin in C (D.934)
Two Piano trios (B flat, D.898 - E flat, D.929)
String Quintet in C (D.956)
The table below concentrates on piano sonatas and other well known piano pieces that are still regularily heard some two centuries after the composers death. Other piano music by Schubert includes a host of short pieces, most of them German dances, minuets, marches and the like.
There is also a considerable number of piano pieces for four hands by Schubert, the Military march being one of the most famous of these.
Legend to the table:
A, B and C: three different numberings of Schubert's piano sonatas: A is the oldest (referring to the 1888 first "integral" edition of Schuberts sonatas by Breitkopf and Härtel , not making reference to the Deutsch catalogue this edition of Schubert sonatas is reprinted from 1970 on by Dover Publications). As more pieces turned up that could be labelled as Sonata, the numbering extended, also re-numbering some of the pieces that had already been published. Note that in Schubert's lifetime "Fantasie" (Phantasy) and "Sonate" (Sonata) had a somewhat overlapping meaning: by convention the Wanderer Fantasy was never numbered as a sonata, while D. 894 always was.
U: unfinished work
numbers 1., 2., etc...: individual movements of the compositions.
Opus: "(p)" or "posth." indicates a posthumous publication.