  We present the Collection of Elemental Routines for Echelle Spectra (CERES).
These routines were developed for the construction of automated pipelines for
the reduction, extraction and analysis of spectra acquired with different
instruments, allowing the obtention of homogeneous and standardised results.
This modular code includes tools for handling the different steps of the
processing: CCD image reductions, identification and tracing of the echelle
orders, optimal and rectangular extraction, computation of the wavelength
solution, estimation of radial velocities, and rough and fast estimation of the
atmospheric parameters. Currently, CERES has been used to develop automated
pipelines for thirteen different spectrographs, namely CORALIE, FEROS, HARPS,
ESPaDOnS, FIES, PUCHEROS, FIDEOS, CAFE, DuPont/Echelle, Magellan/Mike,
Keck/HIRES, Magellan/PFS and APO/ARCES, but the routines can be easily used in
order to deal with data coming from other spectrographs. We show the high
precision in radial velocity that CERES achieves for some of these instruments
and we briefly summarize some results that have already been obtained using the
CERES pipelines.
