Library materials checked out is the number of physical items checked out by library cardholders. These materials include books, DVDs, audio books, et al.  
In 2015 auto renewals were introduced. In 2016 DVD check out period changed from 1 week checkout to 2 weeks.
Descriptions of Materials:
-Audio CD - Compact Disc (CD) recording of a reading of a book, typically a novel.
-Audio Kit - A book accompanied by a Compact Disc (CD) recording of a reading of the book. The CD recording is contained in a pocket in the front or back of the book.
-Board Book - a book for very small children, with the pages pasted to heavy cardboard.
-Book - A written or printed work consisting of pages glued or sewn together along one side and bound in covers.
-Book bucket - A zippered bag that contains multiple titles about a specific subject, designed for educators to use with elementary students.
-Book club kit - Designed for book groups, the kit is a plastic bin with a lid that contains 10 copies of a book and a binder with information about the book to facilitate discussion in a group setting.
-Culture pass - A Culture Pass gives library users two free tickets to participating local cultural institutions and theater performances. Each household can check out one pass at a time (maximum of two a month).
-DVD - A type of compact disc able to store large amounts of data, especially high-resolution audiovisual material.
-Equipment - Other items available for checkout like SRP TrickleStar Plug-In Energy monitors and engraver kits.
-Express checkout - Copies of current popular titles that only check out for seven (7) days, are specific to each location and cannot be renewed or reserved.
-Interlibrary Loan - A system in which one library borrows a book from another library for the use of an individual.
-Magazine - A periodical publication containing articles and illustrations, typically covering a particular subject or area of interest.
-Periodical - a magazine or newspaper published at regular intervals.
-Playaway - Solid-state prerecorded audio player that can store up to 80 hours of audio in high definition.
-Stuffbrary - Library card holders can check out household items, play equipment and more. Stuff is available at all locations, though some items are branch specific.

Number of visits to the Mesa Arts Center, Arizona Museum of Natural History, and i.d.e.a. Museum. The term visits refers to the number of distinct admissions to a program or facility. For example, if an individual were to attend a particular program on ten separate occasions this would be counted as ten visits. This is an industry term and is used for reporting internally to the City of Mesa as well as external agencies that Arts and Culture is affiliated with.The three facilities represented by the dataset are the i.d.e.a. Museum, AzMNH (Arizona Museum of Natural History) and the MAC (Mesa Arts Center) Fiscal year specifies fiscal year by the two year designation e.g. 2009/2010. The City of Mesa fiscal year for all departments is from July 1 - June 30.

Monthly electric consumption data in kWh and customer counts within the City of Mesa's electric service territory broken down by Rate Classification (i.e. Residential, Commercial, Other Public Authority, Interdepartmental). Consumption totals are for the month in which they are billed to the customer (“Billing Month”). Due to the constant reading of utility meters throughout the month, much of the consumption occurs in the month prior to the Billing Month.

The Average Weekday Traffic Volume is a count of the number of vehicle axle pairs (a car has 2 axles) passing through a given location on an average weekday. This is the traffic volume over a one-day weekday period and is a summary of the data that is collected in 15-minute intervals. The 15-minute interval traffic volumes for a particular location are available through Mesa’s Interactive Traffic Count Map application at https://gis.mesaaz.gov/TrafficCounts

Listing of all City expenses per department. This data includes transactions paid by check as well as payroll transactions and transactions paid by wire or electronic draft. Includes record date, payee, amount and the accounting string that describes which fund, organizational department and the activity roll up of the department that benefited from the transaction. The data contained on this website is for informational purposes only and represents expenditure transactions of the City of Mesa. The data includes check payments as well as payroll transactions and transactions paid by wire or electronic draft. The data as represented is unaudited and may contain omissions. For audited financial statements please reference the Comprehensive Annual Financial Report (CAFR). Certain Mesa vendor and customer names have been redacted for confidentiality and safety issues; therefore, not all vendor or customer names are represented. Payments that are voided in a subsequent Fiscal Year may appear as a negative amount. Certain Activity assignments may change mid-year. This year-to-date information is updated monthly and represents the most current activity assignment regardless of the assignment at the time of the transaction.

Total number of program attendees between all program age groups and all branches.

This dataset includes both Code Violations as determined by City of Mesa and reported complaints only, but no code violation found. This dataset does not include the status of the violation except to include the date the violation was closed. Individual up-to-date case status can be found at https://aca.accela.com/mesa/. Also includes violations that were voluntary complied with.

Included: Cases opened since Jan 1, 2005 (with one file per calendar year). These cases were found by a City of Mesa Code Officer to be in violation of one or more city or state codes and are denoted by a value of "N" in "Complaint Only" field. In 2005-2006, the City of Mesa employed 22 Code Officers. Since that time, the number of Code Officers has been reduced to 10.

Not Included: Commercial or Residential construction projects, Demolitions, Applications for Documents or Services, Planning Cases, or Engineering Projects.

Case clearance rates as reported monthly to the FBI’s Uniform Crime Reporting (UCR) program. A case is considered “cleared” when it is cleared by arrest or exceptional means. Cases credited as “cleared” in a given month or year may have been opened in a previous month or year. For this reason, the clearance rate for a given period may be above 100%. For information and definitions about calculating clearance rates visit https://ucr.fbi.gov/crime-in-the-u.s/2016/crime-in-the-u.s.-2016/topic-pages/clearances

Data represents the ethnicity, gender, Equal Employment Opportunity Commission (EEOC) classification and Sworn status for current City of Mesa Employees. Although ethnicity classification is generally self-reported by the employee, in cases where an employee does not wish to self-report, an HR representative is required to enter an ethnicity code based upon observation. Ethnicity codes are defined according to Equal Employment Opportunity Commission's (EEOC) categories: Hispanic White (not of Hispanic origin) Black (not of Hispanic origin) Asian or Pacific Islander, American Indian or Alaskan Native.