
auslesen
to finish reading
To read a book or text completely from beginning to end.
Ich habe den Roman an nur einem Wochenende ausgelesen.
I finished reading the novel in just one weekend.
to finish reading / read out / select
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to finish reading
To read a book or text completely from beginning to end.
Ich habe den Roman an nur einem Wochenende ausgelesen.
I finished reading the novel in just one weekend.

to read out
To retrieve technical data from a storage device, chip, or sensor and display or process it on another device.
Der Techniker muss den Fehlerspeicher des Autos auslesen.
The technician has to read out the car's fault memory.

to select
To select and sort out the best or most suitable items from a group.
Für diesen besonderen Wein werden die Trauben sorgfältig von Hand ausgelesen.
For this special wine, the grapes are carefully selected by hand.
'Auslesen' is a separable verb. In a main clause, the prefix 'aus-' goes at the end. The prefix often emphasizes an action that is brought to an end or something that is extracted from a group.
Er liest gerade den letzten Band seiner Lieblingsserie aus.
He is just finishing the last volume of his favorite series.
In this meaning, the object is always a text. Typical objects are 'ein Buch' (a book), 'einen Roman' (a novel), 'einen Artikel' (an article), or 'eine Zeitschrift' (a magazine).
Hast du die Zeitung schon ausgelesen?
Have you finished reading the newspaper yet?
When it is about technology, the object is a data storage medium. You read out 'Daten' (data), 'einen Chip' (a chip), 'eine Speicherkarte' (a memory card), or 'den Fehlerspeicher' (the fault memory) of a device.
Die Werkstatt muss die Daten aus dem Motorsteuergerät auslesen.
The repair shop has to read out the data from the engine control unit.
In the meaning 'auswählen' (to select), the verb refers to sorting physical things by quality. Typical objects are 'Trauben' (grapes), 'Früchte' (fruit), 'Kaffeebohnen' (coffee beans), or also 'Bewerbungen' (applications).
Die besten Kaffeebohnen werden für den Export von Hand ausgelesen.
The best coffee beans are selected by hand for export.
to select
Auswählen refers generally to making a choice between several possibilities. Auslesen is used when the best or most suitable items are deliberately chosen and removed from a group. Use auswählen for an ordinary choice; when carefully sorting by quality is the focus, auslesen is more appropriate.

Für den Wettbewerb liest die Gärtnerin nur die besten Äpfel aus der Ernte aus.
The gardener picks only the best apples from the harvest for the competition.
Für den Verkauf wählt die Gärtnerin geeignete Äpfel aus der Ernte aus.
The gardener selects suitable apples from the harvest for sale.