• Business and economics:
  • Aggregation problem
    Aggregation problem
    An aggregate in economics is a summary measure describing a market or economy. The aggregation problem refers to the difficulty of treating an empirical or theoretical aggregate as if it reacted like a less-aggregated measure, say, about behavior of an individual agent as described in general...
    
     (economics)
  • Purchasing aggregation, the joining of multiple purchasers in a group purchasing organization
    Group purchasing organization
    In the United States, a group purchasing organization is an entity that is created to leverage the purchasing power of a group of businesses to obtain discounts from vendors based on the collective buying power of the GPO members....
    
     to increase their buying power
  • Community Choice Aggregation
    Community Choice Aggregation
    Community Choice Aggregation or CCA is a system adopted into law in the states of Massachusetts, Ohio, California, New Jersey and Rhode Island which allows cities and counties to aggregate the buying power of individual customers within a defined jurisdiction in order to secure alternative energy...
    
    , the joining of geographically contiguous communities to bypass a conventional energy utility monopoly and seek a greener energy service

• Computer science and telecommunication:
  • Aggregate function
    Aggregate function
    In computer science, an aggregate function is a function where the values of multiple rows are grouped together as input on certain criteria to form a single value of more significant meaning or measurement such as a set, a bag or a list....
    
    , a function in data processing
  • Aggregation, a form of object composition in object-oriented programming
  • Link aggregation
    Link aggregation
    Link aggregation or trunking or link bundling or Ethernet/network/NIC bonding or NIC teaming are computer networking umbrella terms to describe various methods of combining multiple network connections in parallel to increase throughput beyond what a single connection could sustain, and to provide...
    
    , using multiple Ethernet network cables/ports in parallel to increase link speed
  • Packet aggregation
    Packet aggregation
    In a packet-based communications network, packet aggregation is the process of joining multiple packets together into a single transmission unit, in order to reduce the overhead associated with each transmission....
    
    , joining multiple data packets for transmission as a single unit to increase network efficiency
  • Route aggregation, the process of forming a supernet
    Supernet
    A supernet is an Internet Protocol network that is formed from the combination of two or more networks with a common Classless Inter-Domain Routing prefix. The new routing prefix for the combined network aggregates the prefixes of the constituent networks. It must not contain other prefixes of...
    
     in computer networking

• Natural sciences and statistics:
  • Aggregation of soil granules to form soil structure
    Soil structure
    Soil structure is determined by how individual soil granules clump or bind together and aggregate, and therefore, the arrangement of soil pores between them...
    
    
  • Particle aggregation
    Particle aggregation
    Particle aggregation in materials science is direct mutual attraction between particles via van der Waals forces or chemical bonding....
    
    , direct mutual attraction between particles (atoms or molecules) via van der Waals forces or chemical bonding
  • The accumulation of platelet
    Platelet
    Platelets, or thrombocytes , are small,irregularly shaped clear cell fragments , 2–3 µm in diameter, which are derived from fragmentation of precursor megakaryocytes.  The average lifespan of a platelet is normally just 5 to 9 days...
    
    s to the site of a wound to form a platelet plug or a thrombus
  • Flocculation
    Flocculation
    Flocculation, in the field of chemistry, is a process wherein colloids come out of suspension in the form of floc or flakes by the addition of a clarifying agent. The action differs from precipitation in that, prior to flocculation, colloids are merely suspended in a liquid and not actually...
    
    , a process where a solute comes out of solution in the form of floc or flakes
  • Overdispersion
    Overdispersion
    In statistics, overdispersion is the presence of greater variability in a data set than would be expected based on a given simple statistical model....
    
     or statistical aggregation, where the variance of a distribution is higher than expected
  • Aggregation pheromone
  • Protein aggregation
    Protein aggregation
    Protein aggregation is the aggregation of mis-folded proteins, and is thought to be responsible for many degenerative diseases, such as Alzheimer's. It has also been implicated in CAG repeat diseases....
    
    , the aggregation of mis-folded proteins

See also

• Aggregate (disambiguation)
• Aggregator (disambiguation), a web site or computer software that aggregates syndicated web content
• Agrégation
  Agrégation
  In France, the agrégation is a civil service competitive examination for some positions in the public education system. The laureates are known as agrégés...
  
  , in French-speaking countries, higher-level competitive examinations for teachers and professors